Publications
Journal Articles
"Driven Multiphoton Qubit-Resonator Interactions", Mohammad Ayyash, X. Xu, Sahel Ashhab, M. Mariantoni, arXiv:2405.01518 (2024)
"Superconducting flux qubit with ferromagnetic Josephson pi junction operating at zero magnetic field", Sunmi Kim, Leonid V. Abdurakhimov, Duong Pham, Wei Qiu, Hirotaka Terai, Sahel Ashhab, Shiro Saito, Taro Yamashita, Kouichi Semba, arXiv:2401.14597 (2024)
"Quantum circuit synthesis via a random combinatorial search", Sahel Ashhab, Fumiki Yoshihara, Miwako Tsuji, Mitsuhisa Sato, Kouichi Semba, Physical Review A 109, 052605 (2024)
NICT Press Release ”Developed Compiler Acceleration Technology for Quantum Computers” (2024)
NICT Press Release ”Developed Compiler Acceleration Technology for Quantum Computers” (2024)
"Using machine learning to find exact analytic solutions to analytically posed physics problems", Sahel Ashhab, Heliyon 10, e28124 (2024)
"High-frequency suppression of inductive coupling between flux qubit and transmission line resonator", Sahel Ashhab, Ziqiao Ao, Fumiki Yoshihara, Adrian Lupascu, Kouichi Semba, Physica Scripta 99, 045116 (2024)
"Controlling qubit-oscillator systems using linear parameter sweeps", Sahel Ashhab, Tomoko Fuse, Fumiki Yoshihara, Sunmi Kim, Kouichi Semba, New Journal of Physics 25, 093011 (2023)
"Extremely large Lamb shift in a deep‑strongly coupled circuit QED system with a multimode resonator", Ziqiao Ao, Sahel Ashhab, Fumiki Yoshihara, Tomoko Fuse, Kosuke Kakuyanagi, Shiro Saito, Takao Aoki, Kouichi Semba, Scientific Reports 13, 11340 (2023)
"Nonlinear Landau-Zener-Stückelberg-Majorana problem", Sahel Ashhab, Olga A. Ilinskaya, Sergey N. Shevchenko, Physical Review A 106, 062613 (2022)
"All-Nitride Superconducting Qubit with Epitaxial Josephson Junctions on Si Substrate", Sunmi Kim, Hirotaka Terai, Taro Yamashita, Kunihiro Inomata, Journal of the Physical Society of Japan 77, 12_805 (2022)
"Numerical analysis of quantum circuits for state preparation and unitary operator synthesis", Sahel Ashhab, Naoki Yamamoto, Fumiki Yoshihara, Kouichi Semba, Physical Review A 106, 022426 (2022)
NICT Press Release ”New Method to Systematically Find Optimal Quantum Operation Sequences for Quantum Computers Developed” (2022)
NICT Press Release ”New Method to Systematically Find Optimal Quantum Operation Sequences for Quantum Computers Developed” (2022)
"Hamiltonian of a flux qubit-LC oscillator circuit in the deep-strong- coupling regime", Fumiki Yoshihara, Sahel Ashhab, Tomoko Fuse, Motoaki Bamba, Kouichi Semba, Scientific Reports 12, 6764 (2022)
"Speed limits for quantum gates with weakly anharmonic qubits", Sahel Ashhab, Fumiki Yoshihara, Tomoko Fuse, Naoki Yamamoto, Adrian Lupascu, Kouichi Semba, Physical Review A 105, 042614 (2022)
"Enhanced Coherence of all-nitride superconducting qubit epitaxially grown on silicon subtrate", Sunmi KIm, Hitotaka Terai, Taro Yamashita, Wei Qiu, Tomoko Fuse, Fumiki Yoshihara, Sahel Ashhab, Kunihiro Inomata, Kouichi Semba, Communications Materials 2, 98 (2021)
NICT Press Release "All-nitride Superconducting Qubit Made on a Silicon Substrate" (2021)
NICT Press Release "All-nitride Superconducting Qubit Made on a Silicon Substrate" (2021)
"Quantum state preparation protocol for encoding classical data into the amplitudes of a quantum information processing register's wave function", Sahel Ashhab, Physical Review Research 4, 013091 (2022)
"Deterministic three-photon down-conversion by a passive ultrastrong cavity-QED system", Kazuki Koshino, Tomohiro Shitara, Ziqiao Ao , Kouichi Semba, Physical Review Research 4, 013013 (2022)
"Quasiparticle tunneling and 1/f charge noise in ultrastrongly coupled superconducting qubit and resonator", Akiyoshi Tomonaga, Hiroto Mukai, Fumiki Yoshihara, Jaw-Shen Tsai, Physical Review B 104, 224509 (2021)
"Characterization of control in a superconducting qutrit using randomized benchmarking", M. Kononenko, M. A. Yurtalan, S. Ren, J. Shi, S. Ashhab, A. Lupascu, Physical Review Research 3, L042007 (2021)
"Nonclassicality of open circuit QED systems in the deep-strong coupling regime", Tomohiro Shitara, Motoaki Bamba, Fumiki Yoshihara, Tomoko Fuse, Sahel Ashhab, Kouichi Semba, Kazuki Koshino, New Journal of Physics 23, 103009 (2021)
"π phase shifter based on NbN-based ferromagnetic Josephson junction on a silicon substrate", Taro Yamashita, Sunmi Kim, Haruki Kato, Wei Qiu, Kouichi Semba, Akira Fujimaki, Hirotaka Terai, Scientific Reports 10, 13687 (2020)
"Spectrum of the Dicke model in a superconducting qubit-oscillator system", S. Ashhab, Y. Matsuzaki, K. Kakuyanagi, S. Saito, F. Yoshihara, T. Fuse, K. Semba, Physical Review A 99, 063822 (2019)
"Fast amplification and rephasing of entangled cat states in a qubit-oscillator system", Z. Xiao, T. Fuse, S. Ashhab, F. Yoshihara, K. Semba, M. Sasaki, M. Takeoka, J. P. Dowling, Physical Review A 99, 013827 (2019)
"Inversion of qubit energy levels in qubit-oscillator circuits in the deep-strong-coupling regime", Fumiki Yoshihara, Tomoko Fuse, Ziqiao Ao, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Takao Aoki, Kazuki Koshino, Kouichi Semba, Physical Review Letter 120, 183601 (2018)
"Efficient Single-Photon Coupling from a Nitrogen-Vacancy Center Embedded in a Diamond Nanowire Utilizing an Optical Nanofiber", Yuya Yonezu, Kentaro Wakui, Kentaro Furusawa, Masahiro Takeoka, Kouichi Semba, Takao Aoki, Scientific Reports 7, 12985 (2017)
"Superradiant phase transition in the presence of parameter fluctuations", Sahel Ashhab, Kouichi Semba, Physical Review A 95, 053833 (2017)
"Characteristic spectra of circuit quantum electrodynamics systems from the ultrastrong to the deep strong coupling regime", F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba, Physical Review A 95, 053824 (2017)
"Simple method for fabrication of diamond nanowires by inductively coupled plasma reactive ion etching", Kentaro Wakui, Yuya Yonezu, Takao Aoki, Masahiro Takeoka, Kouichi Semba, Japanese Journal of Applied Physics 56, 058005 (2017)
"Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime, Fumiki Yoshihara", Tomoko Fuse, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Kouichi Semba, Nature Physics 13, 44 (2017)
"Observation of collective coupling between an engineered ensemble of macroscopic artificial atoms and a superconducting resonator", Kosuke Kakuyanagi, Yuichiro Matsuzaki, Corentin Deprez, Hiraku Toida, Kouichi Semba, Hiroshi Yamaguchi, William J. Munro, Shiro Saito, Physical Review Letter 117, 210503 (2016)
"Hybrid quantum magnetic field sensor with an electron spin and a nuclear spin in diamond", Yuichiro Matsuzaki, Takaaki Shimo-Oka, Hirotaka Tanaka, Yasuhiro Tokura, Kouichi Semba, Norikazu Mizuochi, Physical Review A 94, 052330 (2016)
"Characterization and control of measurement induced dephasing on superconducting flux qubit with a Josephson bifurcation", K. Kakuyanagi, Y. Matsuzaki, T. Baba, H. Nakano, S. Saito, K. Semba, Journal of the Physical Society of Japan 85, 104801 (2016)
"Optically detected magnetic resonance of high-density ensemble of NV centers in diamond", Y. Matsuzaki, H. Morishita, T. Shimooka, T. Tashima, K. Kakuyanagi, K. Semba, W. J. Munro, H. Yamaguchi, M. Norikazu, S. Saito, Journal of Physics: Condensed. Matter 28, 275302 (2016)
"Improving the lifetime of the nitrogen-vacancy-center ensemble coupled with a superconducting flux qubit by applying magnetic fields", Yuichiro Matsuzaki, Xiaobo Zhu, Kosuke Kakuyanagi, Hiraku Toida, Takaaki Shimooka, Norikazu Mizuochi, Kae Nemoto, Kouichi Semba, W. J. Munro, Hiroshi Yamaguchi, Shiro Saito, Physical Review A 91, 042329 (2015)
"Superconductor-Diamond Hybrid Quantum System", K. Semba, F. Yoshihara, J. E. S. Johansson, X. Zhu, N. Mizuochi, William J. Munro, S.Saito, K. Kakuyanagi, Y. Matsuzaki, Principles and Methods of Quantum Information Technologies, Springer, Lecture Notes in Physics 911, Editors Y. Yamamoto, K. Semba, 515 (2016)
"Analysis of the spectroscopy of a hybrid system composed of a superconducting flux qubit and diamond NV centers", H Cai, *Y Matsuzaki, K Kakuyanagi, H Toida1, X Zhu, N Mizuochi, K Nemoto, K Semba, W J Munro, S Saito, H Yamaguchi, Journal of Physics: Condensed Matter 27, 345702 (2015)
"Observation of quantum Zeno effect in a superconducting flux qubit", K. Kakuyanagi, T. Baba, Y. Matsuzaki, H. Nakano, S. Saito, K. Semba, New Journal of Physics 17, 063035 (2015)
"Scalable quantum computation architecture using always-on Ising interactions via quantum feedforward", Takahiko Satoh, *Yuichiro Matsuzaki, Kosuke Kakuyanagi, William J. Munro, Koichi Semba, Hiroshi Yamaguchi, Shiro Saito, Physical Review A 91, 052329 (2015)
"Improving the Coherence Time of a Quantum System via a Coupling to a Short-Lived System", Y. Matsuzaki, X. Zhu, K. Kakuyanagi, H. Toida, T. Shimo-oka, N. Mizuochi, K. Nemoto, K. Semba, W. J. Munro, H. Yamaguchi, S. Saito, Physical Review Letter 114, 120501 (2014)
"Observation of dark states in a superconductor diamond quantum hybrid system", Xiaobo Zhu, Yuichiro Matsuzaki, Robert Amsu¨ss, Kosuke Kakuyanagi, Takaaki Shimo-Oka, Norikazu Mizuochi, Kae Nemoto, Kouichi Semba, William J. Munro, *Shiro Saito, Nature Communications 5, 3524 (2014)
Conference presentations
Sunmi Kim (Presenter), Leonid V Abdurakhimov, Duong Pham, Wei Qiu, Hirotaka Terai, Sahel Ashhab, Shiro Saito,Taro Yamashita, Kouichi Semba,
NbN-based flux qubit with ferromagnetic π-junction, APS March Meeting 2024, Minneapolis, U.S.A., March 8, 2024
NbN-based flux qubit with ferromagnetic π-junction, APS March Meeting 2024, Minneapolis, U.S.A., March 8, 2024
Mohammad Ayyash (Presenter), Xicheng Xu, Sahel Ashhab, Matteo Mariantoni,
Strongly Driven Two-Photon Qubit-Resonator Interactions: Nonclassical States, Qubit Readout, and More, APS March Meeting 2024, Minneapolis, U.S.A., March 7, 2024
Strongly Driven Two-Photon Qubit-Resonator Interactions: Nonclassical States, Qubit Readout, and More, APS March Meeting 2024, Minneapolis, U.S.A., March 7, 2024
Sahel Ashhab (Presenter), Ziqiao Ao, Fumiki Yoshihara, Adrian Lupascu, Kouichi Semba,
High-frequency suppression of inductive coupling between flux qubit and transmission line resonator, APS March Meeting 2024, Minneapolis, U.S.A., March 5, 2024
High-frequency suppression of inductive coupling between flux qubit and transmission line resonator, APS March Meeting 2024, Minneapolis, U.S.A., March 5, 2024
Sahel Ashhab (Poster),
Quantum information processing using superconducting circuit: Quantum Compiler, Nanotech2024、Tokyo Big Site, January 1 - February 2, 2024
Quantum information processing using superconducting circuit: Quantum Compiler, Nanotech2024、Tokyo Big Site, January 1 - February 2, 2024
Sahel Ashhab (Poster),
Using machine learning to find exact analytic solutions to analytically posed physics problems, The 6th R-CCS international Symposium, Kobe International Conference Center, January 29-30, 2024
Using machine learning to find exact analytic solutions to analytically posed physics problems, The 6th R-CCS international Symposium, Kobe International Conference Center, January 29-30, 2024
Miwako Tsuji, Sahel Ashhab, Kouichi Semba, Mitsuhisa Sato (Poster),
Python vs C on the A64FX processor : A case study from quantum circuit synthesis, The 6th R-CCS international Symposium, Kobe International Conference Center, January 29-30, 2024
Sahel Ashhab、Ziqiao Ao, Fumiki Yoshihara, Tomoko Fuse, Kosuke Kakuyanagi, Shiro Saito, Takao Aoki, Kouichi Semba,
Deep‑strong coupling between superconducting qubit and resonator, Advanced ICT Device Laboratory, Collaboration Meeting 2024, January 19, 2024
Deep‑strong coupling between superconducting qubit and resonator, Advanced ICT Device Laboratory, Collaboration Meeting 2024, January 19, 2024
Kouichi Semba (Presenter),
Can the qubit frequency remain finite even under the very strong Lamb shift from an infinite number of electromagnetic modes, The Workshop on Innovative Nanoscale Devices and Systems (WINDS) 2023, Hawaii, USA, December 5, 2023
Can the qubit frequency remain finite even under the very strong Lamb shift from an infinite number of electromagnetic modes, The Workshop on Innovative Nanoscale Devices and Systems (WINDS) 2023, Hawaii, USA, December 5, 2023
Sunmi Kim (Presenter),
Niobium-nitride-based superconducting qubit, Quantum Innovation 2023, Tokyo Convention Hall, November 16, 2023
Niobium-nitride-based superconducting qubit, Quantum Innovation 2023, Tokyo Convention Hall, November 16, 2023
Sunmi Kim (Presenter), Leonid V. Abdurakhimov, Duong Pham, Wei Qiu, Hirotaka Terai, Sahel Ashhab, Taro Yamashita, Shiro Saito, Kouichi Semba,
Niobium-nitride-based superconducting flux qubit with π-phase shifter, EUCAS2023(16th European Conference on Applied Superconductivity, September 6, 2023
Niobium-nitride-based superconducting flux qubit with π-phase shifter, EUCAS2023(16th European Conference on Applied Superconductivity, September 6, 2023
Sahel Ashhab (Presenter),
New mathematics and machine learning applications from qubits and oscillators, International Council for Industrial and Applied Mathematics (ICIAM), Tokyo, Waseda University, Japan, August 21, 2023
New mathematics and machine learning applications from qubits and oscillators, International Council for Industrial and Applied Mathematics (ICIAM), Tokyo, Waseda University, Japan, August 21, 2023
Sahel Ashhab (Presenter), F. Yoshihara, T. Fuse, N. Yamamoto, A. Lupascu, K. Semba,
Speed limits for two-qubit gates with weakly anharmonic qubits, Sixth International Conference on Applied Mathematics, Modeling and Computer Simulation (AMMCS), Waterloo, Canada, August 18, 2023
Speed limits for two-qubit gates with weakly anharmonic qubits, Sixth International Conference on Applied Mathematics, Modeling and Computer Simulation (AMMCS), Waterloo, Canada, August 18, 2023
Sahel Ashhab (Presenter),
Exploring new frontiers with superconducting qubit circuits: expanding the Hilbert space beyond qubits and pushing qubit-cavity coupling to the deep strong regime, Institute of Quantum Computing (IQC) Seminar, Waterloo, Canada, August 10, 2023
Exploring new frontiers with superconducting qubit circuits: expanding the Hilbert space beyond qubits and pushing qubit-cavity coupling to the deep strong regime, Institute of Quantum Computing (IQC) Seminar, Waterloo, Canada, August 10, 2023
Sahel Ashhab (Presenter),
Exploring new frontiers with superconducting qubit circuits: expanding the Hilbert space beyond qubits and pushing qubit-cavity coupling to the deep strong regime, National Institute of Standards and Technology (NIST), USA, June 26, 2023
Exploring new frontiers with superconducting qubit circuits: expanding the Hilbert space beyond qubits and pushing qubit-cavity coupling to the deep strong regime, National Institute of Standards and Technology (NIST), USA, June 26, 2023
Sahel Ashhab (Presenter),
Exploring new frontiers with superconducting qubit circuits: expanding the Hilbert space beyond qubits and pushing qubit-cavity coupling to the deep strong regime, Quantum Engineering Seminar in Colorado School of Mines, Golden, Colorado, USA, June 23, 2023
Exploring new frontiers with superconducting qubit circuits: expanding the Hilbert space beyond qubits and pushing qubit-cavity coupling to the deep strong regime, Quantum Engineering Seminar in Colorado School of Mines, Golden, Colorado, USA, June 23, 2023
Sahel Ashhab (Presenter), Naoki Yamamoto, Fumiki Yoshihara, Kouichi Semba
Numerical analysis of quantum circuits for state preparation and unitary operator synthesis, The Optica Quantum 2.0 Conference, Hyatt Regency Denver, USA, June 21, 2023
Numerical analysis of quantum circuits for state preparation and unitary operator synthesis, The Optica Quantum 2.0 Conference, Hyatt Regency Denver, USA, June 21, 2023
Sunmi Kim (Presenter), Hirotaka Terai, Taro Yamashita, Kunihiro Inomata,
All-Nitride Superconducting Qubit with Epitaxial Josephson Junctions on Si Substrate, The 158th Research Meeting (online) of JASP Division of Crystals Science and Technology, April 21, 2023
All-Nitride Superconducting Qubit with Epitaxial Josephson Junctions on Si Substrate, The 158th Research Meeting (online) of JASP Division of Crystals Science and Technology, April 21, 2023
Tomoko Fuse (Presenter), Fumiki Yoshihara, Ashhab Sahel, Kosuke Kakuyanagi, Shiro Saito, Kouichi Semba,
Time-domain measurements of a deep-strongly coupled superconducting flux qubit-LC oscillator system, The 70th JSAP Spring Meeting 2023, Yotsuya Campas, Sophia University, March 17, 2023
Time-domain measurements of a deep-strongly coupled superconducting flux qubit-LC oscillator system, The 70th JSAP Spring Meeting 2023, Yotsuya Campas, Sophia University, March 17, 2023
Sahel Ashhab (Presenter), Naoki Yamamoto, Fumiki Yoshihara, Kouichi Semba,
Numerical analysis of quantum circuits for state preparation and unitary operator synthesis, APS March Meeting 2023 Las Vegas, March 10, 2023
Numerical analysis of quantum circuits for state preparation and unitary operator synthesis, APS March Meeting 2023 Las Vegas, March 10, 2023
Ziqiao Ao, Sahel Ashhab ,Fumiki Yoshihara, Tomoko Fuse, Kosuke Kakuyanagi, Shiro Saito ,Takao Aoki, Kouichi Semba (Presenter)
Observation of Extremely Large Lamb Shift in a Multi-mode Circuit QED System in Deep-strong Coupling Regime, APS March Meeting 2023 Las Vegas, March 9, 2023
Observation of Extremely Large Lamb Shift in a Multi-mode Circuit QED System in Deep-strong Coupling Regime, APS March Meeting 2023 Las Vegas, March 9, 2023
S. Kim, H. Terai, T. Yamashita, W. Qiu, T. Fuse, F. Yoshihara, S. Ashhab, K. Inomata, K. Semba(Presentor)
All-nitride superconducting qubits epitaxially grown on silicon substrate,
Workshop on Innovative Nanoscale Devices and Systems (WINDS) 2022, Island of Kaua'i (Hawaii,USA), December 8, 2022
All-nitride superconducting qubits epitaxially grown on silicon substrate,
Workshop on Innovative Nanoscale Devices and Systems (WINDS) 2022, Island of Kaua'i (Hawaii,USA), December 8, 2022
Sahel Ashhab(Presentor), Fumiki Yoshihara, Tomoko Fuse, Naoki Yamamoto, Adrian Lupascu, Kouichi Semba
Speed limits for two-qubit gates with weakly anharmonic qubits,
Workshop on Innovative Nanoscale Devices and Systems (WINDS) 2022, Island of Kaua'i (Hawaii,USA), December 7, 2022
Speed limits for two-qubit gates with weakly anharmonic qubits,
Workshop on Innovative Nanoscale Devices and Systems (WINDS) 2022, Island of Kaua'i (Hawaii,USA), December 7, 2022
Sunmi Kim (Invited), H. Terai, T. Yamashita, W. Qiu, T. Fuse, F. Yoshihara, S. Ashhab, K. Inomata, K. Semba
Coherence properties of NbN-based superconducting qubits
The 15th Asia Pacific Physics Conference (APPC15), August 24, 2022
Coherence properties of NbN-based superconducting qubits
The 15th Asia Pacific Physics Conference (APPC15), August 24, 2022
S. Kim (Invited), H. Terai, T. Yamashita, Wei Qiu, T. Fuse, F. Yoshihara, S. Ashhab, K. Inomata, K. Semba
Superconducting qubits with epitaxially-grown nitride Josephson junctions
The Korean Physical Society (KPS), April 20-22, 2022
S. Ashhab, F. Yoshihara, T. Fuse, N. Yamamoto, A. Lupascu, K. Semba
Speed limits for two-qubit gates with weakly anharmonic qubits
APS March Meeting 2022, March 15, 2022
F. Yoshihara, S. Ashhab, T. Fuse, M. Bamba, K. Semba
Hamiltonian of a flux qubit-LC oscillator circuit in the deep-strong coupling regime
APS March Meeting 2022, March 14, 2022
S. Kim (Invited)
Superconducting qubits with nitride Josephson junctions
RIKEN Center for Quantum Computing (RQC) Seminar, March 9, 2022
S. Ashhab, F. Yoshihara, T. Fuse, N. Yamamoto, A. Lupascu, K. Semba
Speed limits for two-qubit gates with weakly anharmonic qubits
ISNTT 2021, December 14-17 2021
S. Kim, H. Terai, T. Yamashita, W. Qiu, T. Fuse, F. Yoshihara, S. Ashhab, K. Inomata, K. Semba
Enhanced coherence of all-nitride superconducting qubits on a silicon substrate
ISNTT 2021, December 14-17 2021
T. Fuse, F. Yoshihara, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba
Coherence measurements of a flux qubit-LC oscillator circuit in the deep-strong coupling regime
ISNTT 2021, December 14-17 2021
F. Yoshihara, S. Ashhab, T. Fuse, M. Bamba, K. Semba
Hamiltonian of a flux qubit-LC oscillator circuit in the deep-strong-coupling regime
ISNTT 2021, December 14-17 2021
Z. Ao, F. Yoshihara, T. Fuse, T, Aoki, K. Koshino, K. Semba
Parameter Analysis towards Deterministic Photon Down-conversion in Ultra-strong Coupling Regime
ISNTT 2021, December 14-17 2021
S. Kim (Invited), H. Terai, T. Yamashita, W. Qiu, T. Fuse, F. Yoshihara, S. Ashhab, K. Inomata, K. Semba
All-nitride superconducting qubit on silicon substrate
ISS2021, November 30-December2, 2021
T. Fuse, F. Yoshihara, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba
Coherence measurements of a flux qubit-LC oscillator circuit in the deep-strong coupling regime
The Physical Society of Japan (JPS) 2021 Autumn Meeting, September 20-23, 2021
Sahel Ashhab
Optimizing the control of weakly anharmonic superconducting qubits
Q-LEAP Quantum AI Seminar (Special Seminar), April 27, 2021
Sunmi Kim , Hirotaka Terai , Taro Yamashita , Wei Qiu , Tomoko Fuse , Fumiki Yoshihara , Kunihiro Inomata , Kouichi Semba
Capacitively shunted flux qubit based on epitaxially grown NbN/AlN/NbN Josephson junctions on Si substrate
APS March Meeting 2021
APS March Meeting 2021
March 15-19, 2021
Sunmi Kim, Taro Yamashita, Yuki Kato, Wei Qiu, Tomoko Fuse, Fumiki Yoshihara, Koichi Semba, Akira Fujimaki, Hirotaka Terai, Development of NbN-based superconducting qubit with π-phase shifter,
The meeting of the technical group on superconducting electronics(SCE), The Institute of electronics, information and communication engineers.
November 25-26, 2020
The meeting of the technical group on superconducting electronics(SCE), The Institute of electronics, information and communication engineers.
November 25-26, 2020
Fumiki Yoshihara, Sahel Ashhab, Tomoko Fuse, Motoaki Bamba, Kouichi Semba
Circuit Hamiltonian of a flux qubit-LC oscillator system in the deep-strong-coupling regime
The Physical Society of Japan, 2020 fall meeing, September 8-11, 2020
S. Kim, T. Yamashita, H. Terai, W. Qiu, T. Fuse, F. Yoshihara, K. Semba
Development of NbN-based superconducting qubit with π-phase shifter,
The Japan Society of applied physics, 2020 fall meeing, September 8-11, 2020
Kouichi Semba, Sahel Ashhab
Conical intersections and Berry phase in deep-strongly coupled superconducting qubit-resonator system
American Physics Society (APS) March Meeting 2020, Colorado Convention Center, Denver, USA, March 2-6, 2020.
Fumiki Yoshihara, Sahel Ashhab, Tomoko Fuse, Kouichi Semba
Derivation of the Hamiltonian of a flux qubit-LC oscillator circuit using the circuit variables
American Physics Society (APS) March Meeting 2020, Colorado Convention Center, Denver, USA, March 2-6, 2020.
T. Fuse, F. Yoshihara, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba
Time-domain measurements of an ultra-strongly coupled qubit-resonator circuit,
American Physics Society (APS) March Meeting 2020, Colorado Convention Center, Denver, USA, March 2-6, 2020.
S. Kim, T. Fuse, F. Yoshihara, W. Qiu, T. Yamashita, Z. Ao, K. Semba, H. Terai
NbN-based superconducting qubit on Si substrate
American Physics Society (APS) March Meeting 2020, Colorado Convention Center, Denver, USA, March 2-6, 2020.
Tomoko Fuse, Zhihao Xiao, Sahel Ashhab, Fumiki Yoshihara, Masahide Sasaki, Kouichi Semba, Masahiro Takeoka, Jonathan P. Dowling
Fast Amplification and Rephasing of an Entangled Cat States in a Qubit-Oscillator System
Workshop "Present and future of quantum computer research and development"
RIKEN, January 29, 2020
F. Yoshihara, T. Fuse, Z. Ao, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki, K. Koshino, K. Semba
Inversion of Qubit Energy Levels in Qubit-Oscillator Circuits in the Deep-Strong-Coupling Regime
Workshop "Present and future of quantum computer research and development"
RIKEN, January 29, 2020
Recent Progress on the NbN-based Superconducting Qubit: 0-qubit and π-qubit
Workshop "Present and future of quantum computer research and development"
RIKEN, January 29, 2020
F. Yoshihara, S. Ashhab, T. Fuse, K. Semba
Derivation of the Hamiltonian of a flux qubit-LC oscillator circuit using the circuit variables
EU-USA-Japan International Symposium on Quantum Technology (ISQT2019)
Kyoto Briton hotel, Japan, December 16-17, 2019.
Tomoko Fuse, Zhihao Xiao, Sahel Ashhab, Fumiki Yoshihara, Masahide Sasaki, Kouichi Semba, Masahiro Takeoka, Jonathan P. Dowling
Fast Amplification and Rephasing of an Entangled Cat States in a Qubit-Oscillator System
EU-USA-Japan International Symposium on Quantum Technology (ISQT2019)
Kyoto Briton hotel, Japan, December 16-17, 2019.
Sunmi Kim, Taro Yamashita, Tomoko Fuse, Fumiki Yoshihara, Wei Qiu, Ziqiao Ao, Kouichi Semba, Hirotaka Terai
Recent Progress on the NbN-based Superconducting Qubit: 0-qubit and π-qubit
EU-USA-JAPAN International Symposium on Quantum Technology (ISQT2019),
Kyoto Brighton Hotel, Dec. 16-17, 2019.
Kouichi Semba and Sahel Ashhab (QEERI)(Invited)
Conical-intersection and Berry phase in deep-strongly coupled superconducting-qubit-resonator system
Workshop on Innovative Nanoscale Devices and Systems (WINDS2019)(Hawaii)
Kohala Coast, Hawaii, USA, Dec 1 - Dec 6, 2019
F. Yoshihara, S. Ashhab, T. Fuse, K. Semba
Derivation of the Hamiltonian of a flux qubit-LC oscillator circuit using the circuit variables
International School and Symposium on Nanoscale Transport and phoTonics 2019 (ISNTT2019)
NTT Atsugi R&D Center, Japan, November 18-22, 2019.
Tomoko Fuse, Zhihao Xiao, Sahel Ashhab, Fumiki Yoshihara, Masahide Sasaki, Kouichi Semba, Masahiro Takeoka, Jonathan P. Dowling
Fast Amplification and Rephasing of a Cat State in a Qubit-Oscillator System
International School and Symposium on Nanoscale Transport and phoTonics 2019 (ISNTT2019)
NTT Atsugi R&D Center, Japan, November 18-22, 2019.
S. Kim, T. Fuse, F. Yoshihara, W. Qiu, T. Yamashita, Z. Ao, K. Semba, H. Terai
NbN-based Superconducting Qubit on SI Substrate
International Scholl and Symposium on Nanoscale Transport and photonics (ISNTT2019),
NTT Atsugi R&D Center, Japan, November 18-22, 2019.
Ziqiao Ao, Fumiki Yoshihara, Tomoko Fuse, Sunmi Kim, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Tomohiro Shitara, Kazuki Koshino, Takao Aoki, Kouichi Semba
Selection rules of quantum transitions observed in superconducting flux qubit-resonator circuits in the ultra-strong coupling regime
International Scholl and Symposium on Nanoscale Transport and photonics (ISNTT2019),
NTT Atsugi R&D Center, Japan, November 18-22, 2019.
S. Kim, T. Yamashita, T. Fuse, F. Yoshihara, W. Qiu, Z. Ao, K. Semba, H. Terai
Development of NbN-based superconducting quantum circuit: 0-qubit and π-qubit
1st Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC2019)
Nagoya University, Japan, Nov. 12th-13th, 2019
Kouichi Semba (Keynote Address)
Emerging ultrastrong coupling between light and matter observed in circuit quantum electrodynamics
International Symposium on Mathematics, Quantum Theory, and Cryptography (MQC 2019)
Kyushu University, September 25 - 27, 2019,
Fumiki Yoshihara（Invited), Research on superconducting artificial atoms aimed at developing quantum information technology, The Japan Society of Applied Physics, 2019 Fall Meeting, September 18-21, 2019, Hokkaido University
Tomoko Fuse, Zhihao Xiao, Sahel Ashhab, Fumiki Yoshihara, Kouichi Semba, Masahide Sasaki,
Masahiro Takeoka, Jonathan P. Dowling
Fast Amplication and Rephasing of an Entangled Cat States in a Qubit-Oscillator System
Fast Amplication and Rephasing of an Entangled Cat States in a Qubit-Oscillator System
The Japan Society of Applied Physics, 2019 Fall Meeting, September 18-21, 2019, Hokkaido University
Fumiki YOSHIHARA, Sahel ASHHAB, Tomoko FUSE, Kouichi SEMBA
Cross-resonance-based readout scheme of a superconducting flux qubit
The physical society of Japan 2019 Fall Meeting, September 10-13, 2019, Gifu University
Tomoko Fuse, Zhihao Xiao, Sahel Ashhab, Fumiki Yoshihara, Kouichi Semba, Masahide Sasaki,
Masahiro Takeoka, Jonathan P. Dowling
Fast Amplication and Rephasing of an Entangled Cat States in a Qubit-Oscillator System
Fast Amplication and Rephasing of an Entangled Cat States in a Qubit-Oscillator System
The physical society of Japan 2019 Fall Meeting, September 10-13, 2019, Gifu University
S. Kim, T. Yamashita, T. Fuse, F. Yoshihara, W. Qiu, Z. Ao, H. Terai, K. Semba
NbN-based superconducting quantum circuit on Si substrate
The physical society of Japan 2019 Fall Meeting, September 10-13, 2019, Gifu University
Fumiki Yoshihara
Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling
regime, The meeting of the Japan Society of Applied Physics, NII, October 9, 2019
Kouichi Semba(Invited)
Light-matter interactions beyond strong coupling demonstrated using superconducting artificial atom
Nanjing forum on Superconducting Quantum Computer and System (NFSQCS), Nanjing, China, 18-20 May, 2019.
Kouichi Semba(Invited)
Light-matter interaction beyond strong coupling in circuit QED
20th Anniversary of Superconducting Qubits: Progress and Future Directions (SQ20th)
Tsukuba International Congress Center (EPOCHAL TSUKUBA), May 13-15, 2019
Fumiki YOSHIHARA, Sahel ASHHAB, Tomoko FUSE, Kouichi SEMBA
Cross-resonance-based readout scheme of a superconducting flux qubit
Cross-resonance-based readout scheme of a superconducting flux qubit
20th Anniversary of Superconducting Qubits: Progress and Future Directions (SQ20th)
Tsukuba International Congress Center (EPOCHAL TSUKUBA), May 13-15, 2019
Tomoko Fuse, Zhihao Xiao, Sahel Ashhab, Fumiki Yoshihara, Kouichi Semba, Masahide Sasaki,
Masahiro Takeoka, Jonathan P. Dowling
Fast Amplication and Rephasing of an Entangled Cat States in a Qubit-Oscillator System
20th Anniversary of Superconducting Qubits: Progress and Future Directions (SQ20th)
20th Anniversary of Superconducting Qubits: Progress and Future Directions (SQ20th)
Tsukuba International Congress Center (EPOCHAL TSUKUBA), May 13-15, 2019
S. Ashhab, Y. Matsuzaki, K. Kakuyanagi, S. Saito, F. Yoshihara, T. Fuse, K. Semba
Spectrum of the Dicke Model in a Superconducting Qubit-Oscillator System
Spectrum of the Dicke Model in a Superconducting Qubit-Oscillator System
20th Anniversary of Superconducting Qubits: Progress and Future Directions (SQ20th)
Tsukuba International Congress Center (EPOCHAL TSUKUBA), May 13-15, 2019
S. Kim, T. Yamashita, T. Fuse, F. Yoshihara, W. Qiu, Z. Ao, H. Terai, K. Semba
NbN-based superconducting quantum circuit on Si substrate
NbN-based superconducting quantum circuit on Si substrate
20th Anniversary of Superconducting Qubits: Progress and Future Directions (SQ20th)
Tsukuba International Congress Center (EPOCHAL TSUKUBA), May 13-15, 2019
Ziqiao Ao, Fumiki Yoshihara, Tomoko Fuse, Sunmi Kim, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito,
Tomohiro Shitara, Kazuki Koshino, Takao Aoki, Kouichi Semba
Observation of forbidden transitions using superconducting flux qubit-coplanar waveguide resonator circuit in ultra-strong coupling regime
20th Anniversary of Superconducting Qubits: Progress and Future Directions (SQ20th)
Tsukuba International Congress Center (EPOCHAL TSUKUBA), May 13-15, 2019
Z. Ao, F. Yoshihara, T. Fuse, S. Kim, S. Ashhab, K. Kakuyanagi, S. Saito, T. Shitara, K. Koshino, T. Aoki, K. Semba
Observation of forbidden transition using coupled superconducting flux qubit-coplanar waveguide resonator circuit in ultra-strong coupling regime
The Physical Society of Japan (JPS) , Spring Meeting 2019, Kyushu University, 14-17 March, 2019
Tomoko Fuse , Zhihao Xiao , Sahel Ashhab , Fumiki Yoshihara , Kouichi Semba , Masahide Sasaki ,
Masahiro Takeoka , Jonathan P. Dowling,
Fast Amplification and Rephasing of Entangled Cat States in a Qubit-Oscillator System,
APS March Meeting 2019, Boston, USA, March 4-8, 2019
Fumiki Yoshihara , Sahel Ashhab , Tomoko Fuse , Kouichi Semba,
Cross-resonance-based readout scheme of a superconducting flux qubit,
APS March Meeting 2019, Boston, USA, March 4-8, 2019
Sunmi Kim, Fumiki Yoshihara, Tomoko Fuse, Wei Qiu, Ziqiao Ao, Hirotaka Terai, Kou-ichi Semba, Taro Yamashita
Development of superconducting quantum circuit with π-junction qubit
The 12th Superconducting SFQ VLSI Workshop (SSV 2019), Jan 16-17, 2019, NICT(Kobe)
Kouichi Semba(Contributed Talk), Light-Matter Interaction ‘Beyond’ Strong-Coupling Regime
in Superconducting Circuit Quantum Electrodynamics, WINDS2018,
The Westin Hapuna Beach Resort, Kohala Coast, Hawaii, USA, Nov. 25-30, 2018
K. Semba(Invited)
Creation and control of superconducting quantum meta-materials
JST-CREST"Creation of an innovative quantum technology platform based on the advanced control of quantum states"
The 3rd Symposium, Research Center for Advanced Science and Technology, ENEOS Hall
Nov. 21-22, 2018
K. Semba(Invited)
Extremely strong light-matter interactions demonstrated in circuit-QED,
KPS Fall Meeting, 2018.10.24-26 Changwon, Korea
Kouichi Semba, Sahel Ashhab
Superradiance phase transition in the presence of parameter fluctions
The Physical Society of Japan 2018 Autumn Meeting, Doshisha University, September 9-12, 2018
Fumiki Yoshihara
The gap energy and the persistent current of a superconducting flux qubit based on the Aharonov-Casher effect
The Physical Society of Japan 2018 Autumn Meeting, Doshisha University, September 9-12, 2018
Tomoko Fuse, Zhihao Xiao，Sahel Ashhab, Fumiki Yoshihara, Kouichi Semba, Masahiro Takeoka, Jonathan P. Dowling
Schrodinger-cat state generation and amplification in a qubit-harmonic oscillator coupled system
The Physical Society of Japan 2018 Autumn Meeting, Doshisha University, September 9-12, 2018
Sunmi Kim, Taro Yamashita, Fumiki Yoshihara, Tomoko Fuse, Qiu Wei, Hirotaka Terai, Kouichi Semba
Superconducting Quantum Metamaterial with π-junction
The Physical Society of Japan 2018 Autumn Meeting, Doshisha University, September 9-12, 2018
Kouichi Semba(Invited)
Light-Matter Interaction beyond 'Strong Coupling'in Circuit Quantum Electrodynamics
International Workshop on "Fundamental Problems in Mathematical and Theoretical Physics"
Waseda University, Nishi-Waseda Campus, July 16-21, 2018
Kouichi Semba(Invited)
Various Strong Coupling of Light-Matter Interaction in the Superconducting Quantum Circuit
The International Workshop on Recent Progress in Superconductivity (IWRS2018),
Pyeongchang, Korea, July 9-11, 2018
F. Yoshihara, T. Fuse, Z. Ao, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki, K. Koshino, K. Semba
Inversions of qubit energy levels in deep-strongly-coupled qubit-oscillator circuits
The Physical Society of Japan annual meeting, Tokyo University of Science, March 22-25, 2018
T. Fuse, F. Yoshihara, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba
Time-domain measurements of a qubit-harmonic oscillator circuit in the ultra-strong coupling regime
The Physical Society of Japan annual meeting, Tokyo University of Science, March 22-25, 2018
F. Yoshihara, T. Fuse, Z. Ao, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki, K. Koshino, K. Semba
Inversions of qubit energy levels in deep-strongly-coupled qubit-oscillator circuits
APS March Meeting 2018, Los Angels, March 5–9, 2018
S. Ashhab, K. Semba
Superradiance phase transition in the presence of parameter fluctuations
APS March Meeting 2018, Los Angels, March 5–9, 2018
Fumiki Yoshihara(Invited)
Inversion of qubit energy levels in deep-strongly-coupled qubit-oscillator circuits
International Symposium on Dynamics in Artificial Quantum Systems (DAQS2018)
ENEOS Hall, The University of Tokyo, Jan.15-17, 2018
T. Fuse, F. Yoshihara, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba
Time-domain measurements of a qubit-harmonic oscillator circuit in the ultra-strong coupling regime
International Symposium on Dynamics in Artificial Quantum Systems (DAQS2018)
ENEOS Hall, The University of Tokyo, Jan.15-17, 2018
Fumiki Yoshihara(Invited), Tomoko Fuse, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Kouichi Semba
Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime
ISS2017, IINO Hall&Conference Center, Tokyo, Japan, Dec. 13-17, 2017
Kouichi Semba (Invited)
Superconducting quantum metamaterial
The meeting of JST-CREST "Creation of an innovative quantum technology platform based on the advanced control of quantum states"
Kyoto University, Dec. 7-8, 2017
Fumiki Yoshihara, Tomoko Fuse, Ziqiao Ao, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Takao Aoki,
Kazuki Koshino, Kouichi Semba,
Inversion of qubit energy levels in qubit-oscillator circuits in the deep-strong-coupling regime
The meeting of JST-CREST "Creation of an innovative quantum technology platform based on the advanced control of quantum states"
Kyoto University, Dec. 7-8, 2017
Tomoko Fuse, Fumiki Yoshihara, , Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Kouichi Semba
Time-domain measurements and control pf a qubit-oscillator coupled circuit in ultra-strong coupling regime
The meeting of JST-CREST "Creation of an innovative quantum technology platform based on the advanced control of quantum states"
Kyoto University, Dec. 7-8, 2017
Kouichi Semba（Invited）
How Strong can the interaction between a superconducting qubit and an electromagnetic field be?
The 56th meeting of The Japan Society of Applied Physics, Atto Business Center Tokyo, Dec. 1, 2017
Kouichi Semba(Contributed Talk), S. Ashhab
Superradiance phase transition in the presence of parameter fluctuations
WINDS2017, Hapuna Beach Prince Hotel Kohala Coast, Hawaii, USA, Nov. 26-Dec. 1, 2017
Fumiki Yoshihara(Contributed Talk), Tomoko Fuse, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Kouichi Semba
Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime
WINDS2017, Hapuna Beach Prince Hotel Kohala Coast, Hawaii, USA, Nov. 26-Dec. 1, 2017
F. Yoshihara, T. Fuse, Z. Ao, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki, K. Semba
Twists of qubit energies in deep-strongly-coupled qubit-oscillator circuits
ISNTT2017
NTT Basic Reasearch Laboratories, Nov, 13-17, 2017
Tomoko Fuse, Fumiki Yoshihara, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Kouichi Semba
Parity symmetry and selection rules in a qubit-harmonic oscillator coupled system
ISNTT2017
NTT Basic Reasearch Laboratories, Nov, 13-17, 2017
Z. Ao, F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki, K. Semba
Giant Lamb shift observed in deep-strongly-coupled superconducting qubit-oscillator circuit
ISNTT2017
NTT Basic Reasearch Laboratories, Nov, 13-17, 2017
Fumiki YOSHIHARA, Tomoko Fuse, Ao Ziqiao, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Takao, Aoki, Kouichi Semba
Twists of qubit energy levels in deep-strongly-coupled qubit-oscillator circuits
Quantum Theory&Technology Un-official Meeting 2017
Oct. 7-8, 2017, Hokkaido University
F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba
Characteristic spectra of circuit quantum electrodynamics systems from the ultrastrong to
the deep-strong-coupling regime
The Physical Society of Japan 2017 Autumn Meeting
Sep. 21-24, 2017, Iwate University
T. Fuse, F. Yoshihara, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba
Symmetry and selection rules in a qubit-oscillator coupled system
The Physical Society of Japan 2017 Autumn Meeting
Sep. 21-24, 2017, Iwate University
Z. Ao, F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki, K. Semba
Giant Lamb shift observed in deep-strongly-coupled superconducting qubit-oscillator
circuit
The Physical Society of Japan 2017 Autumn Meeting
Sep. 21-24, 2017, Iwate University
F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba
Characteristic spectra of circuit quantum electrodynamics systems from the ultrastrong to
the deep-strong-coupling regime
International Symposium on Hybrid Quantum Sytems 2017 (HQS2017)
Sep. 10-13, 2017, Miyagi-Zao
T. Fuse, F. Yoshihara, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba
Symmetry and selection rules in a qubit-oscillator coupled system
International Symposium on Hybrid Quantum Sytems 2017 (HQS2017)
Sep. 10-13, 2017, Miyagi-Zao
Z. Ao, F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki, K. Semba
Giant Lamb shift observed in deep-strongly-coupled superconducting qubit-oscillator
circuit
International Symposium on Hybrid Quantum Sytems 2017 (HQS2017)
Sep. 10-13, 2017, Miyagi-Zao
Kouichi Semba(Invited)
New Light-Matter Ground State in the Deep Strong Coupling Regime
EDISON 20, July 17-21, 2017, Hyatt Regency Hotel, Buffalo, NY, USA
Kouichi Semba(Invited)
Superconducting qubit–oscillator circuit in the extremely strong-coupling
International Workshop on Quantum Technologies (QTech2017), June 12-13, 2017, The Univ. of Tokyo
Kouichi Semba(Invited)
Superconducting qubit–oscillator circuit beyond the ultrastrong-coupling regime
Symposium on Atomic, Molecular, and Optical Sciences 14, June 30-July 1, 2017, The Univ. of Electro-Communications
Kouichi Semba (invited)
Quantum Hybrid System and NV Centers in Diamond
The 64th JSAP Spring Meeting 2017, March 14-17, Pacifico Yokohama
T. Fuse, F. Yoshihara, S. Ashhab, K. Semba
Deep strong coupling in a circuit QED system - huge Lamb shift -
American Physics Society (APS) March Meeting 2017, Ernest N. Morial Convention Center, New Orleans, USA, March 13-17, 2017.
F. Yoshihara, T. Fuse, K. Semba, S. Ashhab
Characteristic spectra of circuit quantum electrodynamics systems from the ultrastrong to the deep strong coupling regime
American Physics Society (APS) March Meeting 2017, Ernest N. Morial Convention Center, New Orleans, USA, March 13-17, 2017.
T. Fuse (invited), F. Yoshihara, S. Ashhab, Kosuke Kakuyanagi, Shiro Saito, K. Semba,
Superconducting Qubit-Oscillator Circuit in the Deep Strong Coupling Regime ~Experiments~
Interdisciplinary Workshop on Quantum Device (IWQD2017), Tokyo, 6-8 March, 2017
T. Fuse (invited), F. Yoshihara, S. Ashhab, K. Semba
Superconducting Qubit-Oscillator Circuit in the Deep Strong Coupling Regime
JSAP Workshop on Quantum Information and Related Fields, NII, Tokyo, Japan, March 2-3, 2017.
T. Fuse (invited), F. Yoshihara, S. Ashhab, K. Semba
Superconducting qubit-oscillator circuit in the deep strong coupling regime
Workshop on Virtual Photons in ultra-strong coupled Systems, RIKEN, Saitama, Japan, Janurary 23-26, 2017.
Fumiki Yoshihara (Invited)
Characteristic spectra of circuit quantum electrodynamics systems from the ultrastrong to the deep strong coupling regime
Workshop on Virtual Photons in ultra-strong coupled Systems, RIKEN, Saitama, Japan, Janurary 23-26, 2017.
Kouichi Semba (Invited)
Stable ‘Molecular’ State of Photons and Artificial Atom
International Workshop on Nano-Spin Conversion Science and Quantum Spin Dynamics(NSCS-QSD) October 12-15, 2016, The University of Tokyo
Fumiki Yoshihara (Invited)
Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime
International Workshop on Ultra-Strong Light-Matter Interactions: theory and applications to quantum information, 19-21 September 2016, Bilbao, Spain
Superconducting Artificial Atoms/harmonic oscillator Ultra-strong Coupling
Tomoko Fuse 【Invited】
The 63rd JSAP Spring Meeting, 2016, March 22, 2016, Tokyo Inst. Of Tech. Ookayama Campus
Deep strong coupling in a circuit QED system (1) – Introduction –
Kouichi Semba , Tomoko Fuse , Fumiki Yoshihara , Sahel Ashhab
American Physical Society March Meeting 2016 ,March 14–18, 2016, Baltimore, Maryland
Deep strong coupling in a circuit QED system (2) – experiment –
Tomoko Fuse , Fumiki Yoshihara , Sahel Ashhab , Kouichi Semba
American Physical Society March Meeting 2016 ,March 14–18, 2016, Baltimore, Maryland
Deep strong coupling in a circuit QED system (3) – data and analysis –
Fumiki Yoshihara , Tomoko Fuse , Kouichi Semba , Sahel Ashhab
American Physical Society March Meeting 2016 ,March 14–18, 2016, Baltimore, Maryland
Physics of Superconducting quantum circuit – perspective of strong coupling and beyond
Kouichi Semba, IWQD2015 【Invited】, Oct.13-14, 2015, NII
Superconducting Flux Qubit & Electron Spin Ensemble in Diamond Hybrid Quantum System, K. Semba
The 67th Fujihara seminar: “Real-time dynamics of physical phenomena and manipulation
by external field” 【Invited】, September 25, 2014, Tomakomai, Hokkaido, Japan
Experimental using Superconducting quantum bit and microwave
Fumiki Yoshihara
Seminar of quantum information for young researchers【Invited】
August 10-11, 2014, Yukawa Institute for Theoretical Physics, Kyoto University
T. Fuse, Fumiki Yoshihara, Kouichi Semba
Josephson bifurcation amplifier, flux qubit and Josephson parametric amplifier
Gordon Research Conference: Quantum Science 2014, 26 July 2014,
Stonehill College, MA, USA
Kouichi Semba
Macroscopic Quantum Hybrid System【Invited】
QIT29, Nov 19, 2013, Nishiwaseda Campus, Waseda University
Challenges & Trends of Quantum Information Technology in Japan
Kouichi Semba
The 1st Japan-Canada IT Symposium【Invited】, Oct 9, 2013, Embassy of Canada, Japan
Kouichi Semba [invited]
Coherent Coupling of a Superconducting Flux Qubit to an Electron Spin Ensemble in Diamond,
Gordon Research Conference: Quantum Science 2012, Stonehill College, MA, USA, 12-17 August 2012
Superradiance phase transition in the presence of parameter fluctions
The Physical Society of Japan 2018 Autumn Meeting, Doshisha University, September 9-12, 2018
Fumiki Yoshihara
The gap energy and the persistent current of a superconducting flux qubit based on the Aharonov-Casher effect
The Physical Society of Japan 2018 Autumn Meeting, Doshisha University, September 9-12, 2018
Tomoko Fuse, Zhihao Xiao，Sahel Ashhab, Fumiki Yoshihara, Kouichi Semba, Masahiro Takeoka, Jonathan P. Dowling
Schrodinger-cat state generation and amplification in a qubit-harmonic oscillator coupled system
The Physical Society of Japan 2018 Autumn Meeting, Doshisha University, September 9-12, 2018
Sunmi Kim, Taro Yamashita, Fumiki Yoshihara, Tomoko Fuse, Qiu Wei, Hirotaka Terai, Kouichi Semba
Superconducting Quantum Metamaterial with π-junction
The Physical Society of Japan 2018 Autumn Meeting, Doshisha University, September 9-12, 2018
Kouichi Semba(Invited)
Light-Matter Interaction beyond 'Strong Coupling'in Circuit Quantum Electrodynamics
International Workshop on "Fundamental Problems in Mathematical and Theoretical Physics"
Waseda University, Nishi-Waseda Campus, July 16-21, 2018
Kouichi Semba(Invited)
Various Strong Coupling of Light-Matter Interaction in the Superconducting Quantum Circuit
The International Workshop on Recent Progress in Superconductivity (IWRS2018),
Pyeongchang, Korea, July 9-11, 2018
F. Yoshihara, T. Fuse, Z. Ao, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki, K. Koshino, K. Semba
Inversions of qubit energy levels in deep-strongly-coupled qubit-oscillator circuits
The Physical Society of Japan annual meeting, Tokyo University of Science, March 22-25, 2018
T. Fuse, F. Yoshihara, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba
Time-domain measurements of a qubit-harmonic oscillator circuit in the ultra-strong coupling regime
The Physical Society of Japan annual meeting, Tokyo University of Science, March 22-25, 2018
F. Yoshihara, T. Fuse, Z. Ao, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki, K. Koshino, K. Semba
Inversions of qubit energy levels in deep-strongly-coupled qubit-oscillator circuits
APS March Meeting 2018, Los Angels, March 5–9, 2018
S. Ashhab, K. Semba
Superradiance phase transition in the presence of parameter fluctuations
APS March Meeting 2018, Los Angels, March 5–9, 2018
Fumiki Yoshihara(Invited)
Inversion of qubit energy levels in deep-strongly-coupled qubit-oscillator circuits
International Symposium on Dynamics in Artificial Quantum Systems (DAQS2018)
ENEOS Hall, The University of Tokyo, Jan.15-17, 2018
T. Fuse, F. Yoshihara, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba
Time-domain measurements of a qubit-harmonic oscillator circuit in the ultra-strong coupling regime
International Symposium on Dynamics in Artificial Quantum Systems (DAQS2018)
ENEOS Hall, The University of Tokyo, Jan.15-17, 2018
Fumiki Yoshihara(Invited), Tomoko Fuse, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Kouichi Semba
Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime
ISS2017, IINO Hall&Conference Center, Tokyo, Japan, Dec. 13-17, 2017
Kouichi Semba (Invited)
Superconducting quantum metamaterial
The meeting of JST-CREST "Creation of an innovative quantum technology platform based on the advanced control of quantum states"
Kyoto University, Dec. 7-8, 2017
Fumiki Yoshihara, Tomoko Fuse, Ziqiao Ao, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Takao Aoki,
Kazuki Koshino, Kouichi Semba,
Inversion of qubit energy levels in qubit-oscillator circuits in the deep-strong-coupling regime
The meeting of JST-CREST "Creation of an innovative quantum technology platform based on the advanced control of quantum states"
Kyoto University, Dec. 7-8, 2017
Tomoko Fuse, Fumiki Yoshihara, , Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Kouichi Semba
Time-domain measurements and control pf a qubit-oscillator coupled circuit in ultra-strong coupling regime
The meeting of JST-CREST "Creation of an innovative quantum technology platform based on the advanced control of quantum states"
Kyoto University, Dec. 7-8, 2017
Kouichi Semba（Invited）
How Strong can the interaction between a superconducting qubit and an electromagnetic field be?
The 56th meeting of The Japan Society of Applied Physics, Atto Business Center Tokyo, Dec. 1, 2017
Kouichi Semba(Contributed Talk), S. Ashhab
Superradiance phase transition in the presence of parameter fluctuations
WINDS2017, Hapuna Beach Prince Hotel Kohala Coast, Hawaii, USA, Nov. 26-Dec. 1, 2017
Fumiki Yoshihara(Contributed Talk), Tomoko Fuse, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Kouichi Semba
Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime
WINDS2017, Hapuna Beach Prince Hotel Kohala Coast, Hawaii, USA, Nov. 26-Dec. 1, 2017
F. Yoshihara, T. Fuse, Z. Ao, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki, K. Semba
Twists of qubit energies in deep-strongly-coupled qubit-oscillator circuits
ISNTT2017
NTT Basic Reasearch Laboratories, Nov, 13-17, 2017
Tomoko Fuse, Fumiki Yoshihara, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Kouichi Semba
Parity symmetry and selection rules in a qubit-harmonic oscillator coupled system
ISNTT2017
NTT Basic Reasearch Laboratories, Nov, 13-17, 2017
Z. Ao, F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki, K. Semba
Giant Lamb shift observed in deep-strongly-coupled superconducting qubit-oscillator circuit
ISNTT2017
NTT Basic Reasearch Laboratories, Nov, 13-17, 2017
Fumiki YOSHIHARA, Tomoko Fuse, Ao Ziqiao, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Takao, Aoki, Kouichi Semba
Twists of qubit energy levels in deep-strongly-coupled qubit-oscillator circuits
Quantum Theory&Technology Un-official Meeting 2017
Oct. 7-8, 2017, Hokkaido University
F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba
Characteristic spectra of circuit quantum electrodynamics systems from the ultrastrong to
the deep-strong-coupling regime
The Physical Society of Japan 2017 Autumn Meeting
Sep. 21-24, 2017, Iwate University
T. Fuse, F. Yoshihara, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba
Symmetry and selection rules in a qubit-oscillator coupled system
The Physical Society of Japan 2017 Autumn Meeting
Sep. 21-24, 2017, Iwate University
Z. Ao, F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki, K. Semba
Giant Lamb shift observed in deep-strongly-coupled superconducting qubit-oscillator
circuit
The Physical Society of Japan 2017 Autumn Meeting
Sep. 21-24, 2017, Iwate University
F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba
Characteristic spectra of circuit quantum electrodynamics systems from the ultrastrong to
the deep-strong-coupling regime
International Symposium on Hybrid Quantum Sytems 2017 (HQS2017)
Sep. 10-13, 2017, Miyagi-Zao
T. Fuse, F. Yoshihara, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba
Symmetry and selection rules in a qubit-oscillator coupled system
International Symposium on Hybrid Quantum Sytems 2017 (HQS2017)
Sep. 10-13, 2017, Miyagi-Zao
Z. Ao, F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki, K. Semba
Giant Lamb shift observed in deep-strongly-coupled superconducting qubit-oscillator
circuit
International Symposium on Hybrid Quantum Sytems 2017 (HQS2017)
Sep. 10-13, 2017, Miyagi-Zao
Kouichi Semba(Invited)
New Light-Matter Ground State in the Deep Strong Coupling Regime
EDISON 20, July 17-21, 2017, Hyatt Regency Hotel, Buffalo, NY, USA
Kouichi Semba(Invited)
Superconducting qubit–oscillator circuit in the extremely strong-coupling
International Workshop on Quantum Technologies (QTech2017), June 12-13, 2017, The Univ. of Tokyo
Kouichi Semba(Invited)
Superconducting qubit–oscillator circuit beyond the ultrastrong-coupling regime
Symposium on Atomic, Molecular, and Optical Sciences 14, June 30-July 1, 2017, The Univ. of Electro-Communications
Kouichi Semba (invited)
Quantum Hybrid System and NV Centers in Diamond
The 64th JSAP Spring Meeting 2017, March 14-17, Pacifico Yokohama
T. Fuse, F. Yoshihara, S. Ashhab, K. Semba
Deep strong coupling in a circuit QED system - huge Lamb shift -
American Physics Society (APS) March Meeting 2017, Ernest N. Morial Convention Center, New Orleans, USA, March 13-17, 2017.
F. Yoshihara, T. Fuse, K. Semba, S. Ashhab
Characteristic spectra of circuit quantum electrodynamics systems from the ultrastrong to the deep strong coupling regime
American Physics Society (APS) March Meeting 2017, Ernest N. Morial Convention Center, New Orleans, USA, March 13-17, 2017.
T. Fuse (invited), F. Yoshihara, S. Ashhab, Kosuke Kakuyanagi, Shiro Saito, K. Semba,
Superconducting Qubit-Oscillator Circuit in the Deep Strong Coupling Regime ~Experiments~
Interdisciplinary Workshop on Quantum Device (IWQD2017), Tokyo, 6-8 March, 2017
T. Fuse (invited), F. Yoshihara, S. Ashhab, K. Semba
Superconducting Qubit-Oscillator Circuit in the Deep Strong Coupling Regime
JSAP Workshop on Quantum Information and Related Fields, NII, Tokyo, Japan, March 2-3, 2017.
T. Fuse (invited), F. Yoshihara, S. Ashhab, K. Semba
Superconducting qubit-oscillator circuit in the deep strong coupling regime
Workshop on Virtual Photons in ultra-strong coupled Systems, RIKEN, Saitama, Japan, Janurary 23-26, 2017.
Fumiki Yoshihara (Invited)
Characteristic spectra of circuit quantum electrodynamics systems from the ultrastrong to the deep strong coupling regime
Workshop on Virtual Photons in ultra-strong coupled Systems, RIKEN, Saitama, Japan, Janurary 23-26, 2017.
Kouichi Semba (Invited)
Stable ‘Molecular’ State of Photons and Artificial Atom
International Workshop on Nano-Spin Conversion Science and Quantum Spin Dynamics(NSCS-QSD) October 12-15, 2016, The University of Tokyo
Fumiki Yoshihara (Invited)
Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime
International Workshop on Ultra-Strong Light-Matter Interactions: theory and applications to quantum information, 19-21 September 2016, Bilbao, Spain
Superconducting Artificial Atoms/harmonic oscillator Ultra-strong Coupling
Tomoko Fuse 【Invited】
The 63rd JSAP Spring Meeting, 2016, March 22, 2016, Tokyo Inst. Of Tech. Ookayama Campus
Deep strong coupling in a circuit QED system (1) – Introduction –
Kouichi Semba , Tomoko Fuse , Fumiki Yoshihara , Sahel Ashhab
American Physical Society March Meeting 2016 ,March 14–18, 2016, Baltimore, Maryland
Deep strong coupling in a circuit QED system (2) – experiment –
Tomoko Fuse , Fumiki Yoshihara , Sahel Ashhab , Kouichi Semba
American Physical Society March Meeting 2016 ,March 14–18, 2016, Baltimore, Maryland
Deep strong coupling in a circuit QED system (3) – data and analysis –
Fumiki Yoshihara , Tomoko Fuse , Kouichi Semba , Sahel Ashhab
American Physical Society March Meeting 2016 ,March 14–18, 2016, Baltimore, Maryland
Physics of Superconducting quantum circuit – perspective of strong coupling and beyond
Kouichi Semba, IWQD2015 【Invited】, Oct.13-14, 2015, NII
Superconducting Flux Qubit & Electron Spin Ensemble in Diamond Hybrid Quantum System, K. Semba
The 67th Fujihara seminar: “Real-time dynamics of physical phenomena and manipulation
by external field” 【Invited】, September 25, 2014, Tomakomai, Hokkaido, Japan
Experimental using Superconducting quantum bit and microwave
Fumiki Yoshihara
Seminar of quantum information for young researchers【Invited】
August 10-11, 2014, Yukawa Institute for Theoretical Physics, Kyoto University
T. Fuse, Fumiki Yoshihara, Kouichi Semba
Josephson bifurcation amplifier, flux qubit and Josephson parametric amplifier
Gordon Research Conference: Quantum Science 2014, 26 July 2014,
Stonehill College, MA, USA
Kouichi Semba
Macroscopic Quantum Hybrid System【Invited】
QIT29, Nov 19, 2013, Nishiwaseda Campus, Waseda University
Challenges & Trends of Quantum Information Technology in Japan
Kouichi Semba
The 1st Japan-Canada IT Symposium【Invited】, Oct 9, 2013, Embassy of Canada, Japan
Kouichi Semba [invited]
Coherent Coupling of a Superconducting Flux Qubit to an Electron Spin Ensemble in Diamond,
Gordon Research Conference: Quantum Science 2012, Stonehill College, MA, USA, 12-17 August 2012
Others
2011.7.8: Awarded the paper encouragement prize of The Japan society of applied physics.K. Kakuyanagi, S. Kagei, S. Saito, H. Nakano, K. Semba
Generation of Non-Classical Microwave Photon States in an Inductor-Capacitor Resonator Coupled to a Superconducting Flux Qubit
Appl. Phys. Express 3 103101 (2010)
“Experimental demonstration of quantum memory in diamond”
Generation of Non-Classical Microwave Photon States in an Inductor-Capacitor Resonator Coupled to a Superconducting Flux Qubit
Appl. Phys. Express 3 103101 (2010)
“Experimental demonstration of quantum memory in diamond”
“Hybrid system composed of a superconducting flux qubit and an electron spin ensemble in diamond: A theoretical analysis”
Journal：
Tomoko Fuse, Fumiki Yoshihara, Kosuke Kakuyanagi, Kouichi Semba
Interaction between an Artificial Atom and an Electromagnetic Field～Beyond the Strong Couplin～
The article of The physical society of Japan, 2018, January P.21-26, Vol 73, No.1, 2018
Dr. Kouichi Semba, SCIENTIFIC AMERICAN June 2016 P.34-43
Translation of
Original Title “Quantum Connections” SCIENTIFIC AMERICAN May 2016
Original Authors: Christopher R. Monroe, Robert J. Schoelkopf, Mikhail D. Lukin
Dr. Kouichi Semba, “Quantum Entanglement” Scientific American January 2012, p.25
X. Zhu, et al.
Coherent coupling of a superconducting flux qubit to an electron spin ensemble in diamond,
Nature 478, 221-224 (2011)
Quantum engineering: Spins coupled to a persistent current,
Nature, News & Views 478, 195-196 (2011)