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, and J. P. Dowling

Phys. Rev. A 99, 013827 (2019)

doi: 10. 1103/PhysRevA 99. 013827

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

Phys. Rev. Lett. 120, 183601 (2018)

doi: 10.1103/PhysRevLett.120.183601

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, Article number: 12985 (2017)

doi:10.1038/s41598-017-13309-z

Superradiant phase transition in the presence of parameter fluctuations

S. Ashhab and K. Semba ,

Physical Review A 95, 053833 (2017) DOI: 10.1103/PhysRevA.95.053833

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) DOI: 10.1103/PhysRev.95.053824

Simple method for fabrication of diamond nanowires by inductively coupled plasma reactive ion etching

Kentaro Wakui, Yuya Yonezu, Takao Aoki, Masahiro Takeoka, and Kouichi Semba

Japanese Journal of Applied Physics 56, 058005 (2017) DOI:10.7567/JJAP.56.058005

Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime

*Fumiki Yoshihara, Tomoko Fuse, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito,

*Kouichi Semba

Nature Physics 13, 44-47 (2017) doi:10.1038/nphys3906

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, and Shiro Saito

Phys. Rev. Lett. 117, 210503 (2016) DOI: 10.1103/PhysRevLett.117.210503

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, and Norikazu Mizuochi

Phys. Rev. A 94, 052330 (2016) DOI: 10.1103/PhysRevA.94.052330

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, and K. Semba

J. Phys. Soc. Jpn. 85, 104801 (2016) DOI: 10.7566/JPSJ.85.104801

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, and S. Saito

J. Phys.: Condens. Matter 28, 275302 (2016) DOI: 10.1088/0953-8984/28/27/275302

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, and Shiro Saito

Phys. Rev. A 91, 042329 (2015) DOI: 10.1103/PhysRevA.91.042329

Superconductor-Diamond Hybrid Quantum System

*K. Semba, F. Yoshihara, J. E. S. Johansson, X. Zhu, N. Mizuochi, William J. Munro,

S.Saito, K. Kakuyanagi, and Y. Matsuzaki

Principles and Methods of Quantum Information Technologies, Springer, Lecture Notes in Physics 911, Editors Y. Yamamoto & K. Semba, 515-538 (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 and H Yamaguchi

J. Phys.: Condens. Matter 27, 1-15 (2015)

Observation of quantum Zeno effect in a superconducting flux qubit

*K. Kakuyanagi, T. Baba, Y. Matsuzaki, H. Nakano, S. Saito and K. Semba

New J. Phys. 17 (2015) 063035

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, and Shiro Saito

Phys. Rev. A 91, 052329-1～6 (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

Phys. Rev. Lett. 114, 120501-1～5 (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, 3424, 1-6 (2014)

Home > Organization > Advanced ICT Research Institute > Frontier Research Laboratory > Macroscopic Quantum Physics Research Project > Work

**Publications**

**Conference presentations**

Observation of forbidden transition using coupled superconducting flux qubit-coplanar waveguide resonator circuit in ultra-strong coupling regime

Z. Ao, F. Yoshihara, T. Fuse, S. Kim, S. Ashhab, K. Kakuyanagi, S. Saito, T. Shitara, K. Koshino, T. Aoki, K. Semba

The Physical Society of Japan (JPS) , Spring Meeting 2019, Kyushu University, 14-17 March, 2019

Ground state of the quantum Rabi model in the deep strong coupling regime coupled to an environment

T. Shitara, M. Baba, F. Yoshihara, T. Fuse, K. Semba, K. Koshino

The Physical Society of Japan (JPS) , Spring Meeting 2019, Kyushu University, 14-17 March, 2019

Characterization of barrier thickness dependence of critical current density in ferromagnetic Josephson junctions for superconducting qubit

H. Kato, T. Kamiya, S. Kim, .W. Qiu, H. Terai, K. Semba, T. Yamashita, and A. Fujimaki

The Japan Society of Applied Physics (JSAP) , Spring Meeting 2019

March 9-12, 2019, Tokyo Institute of Technology

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

Development of superconducting quantum circuit with π-junction qubit

Sunmi Kim, Fumiki Yoshihara, Tomoko Fuse, Wei Qiu, Ziqiao Ao, Hirotaka Terai, Kou-ichi Semba,

and Taro Yamashita

The 12th Superconducting SFQ VLSI Workshop (SSV 2019), Jan 16-17, 2019, NICT(Kobe)

Research activities on superconducting devices in NICT

Hirotaka Terai, Shigehito Miki, Wei Qiu, Shigeyuki Miyajima, Masahiro Yabuno, amd Fumihiro China

The 12th Superconducting SFQ VLSI Workshop (SSV 2019), Jan 16-17, 2019, NICT(Kobe)

Fabrication and Characterization of Ferromagnetic Josephson Junctions for π-shift Superconducting Flux Quantum Bit

Haruki Kato, Tomohiro Kamiya, Sunmi Kim, Wei Qiu, Akira Kawakami,

Hirotaka Terai, Koichi Semba, Taro Yamashita, and Akira Fujimaki

The 12th Superconducting SFQ VLSI Workshop (SSV 2019), Jan 16-17, 2019, NICT(Kobe)

Ground state of the quantum Rabi model in the deep strong coupling regime coupled to an environment

T. Shitara, M. Baba, F. Yoshihara, T. Fuse, K. Semba, K. Koshino

QIT39, Research Center for Advanced Science and Technology, ENEOS Hall

Nov. 26-27, 2018

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

Superradiance phase transition in the presence of parameter fluctions

Kouichi Semba, Sahel Ashhab

The Physical Society of Japan 2018 Autumn Meeting, Doshisha University, September 9-12, 2018

The gap energy and the persistent current of a superconducting flux qubit based on the Aharonov-Casher effect

Fumiki Yoshihara

The Physical Society of Japan 2018 Autumn Meeting, Doshisha University, September 9-12, 2018

Schrodinger-cat state generation and amplification in a qubit-harmonic oscillator coupled system

Tomoko Fuse, Zhihao Xiao，Sahel Ashhab, Fumiki Yoshihara, Kouichi Semba, Masahiro Takeoka, Jonathan P. Dowling

The Physical Society of Japan 2018 Autumn Meeting, Doshisha University, September 9-12, 2018

Superconducting Quantum Metamaterial with π-junction

Sunmi Kim, Taro Yamashita, Fumiki Yoshihara, Tomoko Fuse, Qiu Wei, Hirotaka Terai, Kouichi Semba

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

Inversions of qubit energy levels in deep-strongly-coupled qubit-oscillator circuits

F. Yoshihara, T. Fuse, Z. Ao, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki,

K. Koshino, and K. Semba

The Physical Society of Japan annual meeting, Tokyo University of Science, March 22-25, 2018

Time-domain measurements of a qubit-harmonic oscillator circuit in the ultra-strong coupling regime

T. Fuse, F. Yoshihara, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba

The Physical Society of Japan annual meeting, Tokyo University of Science, March 22-25, 2018

Inversions of qubit energy levels in deep-strongly-coupled qubit-oscillator circuits

F. Yoshihara, T. Fuse, Z. Ao, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki,

K. Koshino, and K. Semba

APS March Meeting 2018, Los Angels, March 5–9, 2018

Superradiance phase transition in the presence of parameter fluctuations

S. Ashhab, K. Semba

APS March Meeting 2018, Los Angels, March 5–9, 2018

超伝導人工原子とマイクロ波真空ゆらぎからなる新しい「分子」状態

仙場浩一(招待講演), 未来ICTシンポジウム2018, 東京ビッグサイト, 2018年2月14日

Inversion of qubit energy levels in deep-strongly-coupled qubit-oscillator circuits

Fumiki Yoshihara(Invited)

International Symposium on Dynamics in Artificial Quantum Systems (DAQS2018)

ENEOS Hall, The University of Tokyo, Jan.15-17, 2018

Time-domain measurements of a qubit-harmonic oscillator circuit in the ultra-strong coupling regime

T. Fuse, F. Yoshihara, S. Ashhab, K. Kakuyanagi, S. Saito, K. Semba

International Symposium on Dynamics in Artificial Quantum Systems (DAQS2018)

ENEOS Hall, The University of Tokyo, Jan.15-17, 2018

Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime

Fumiki Yoshihara(Invited), Tomoko Fuse, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Kouichi

Semba

ISS2017, IINO Hall&Conference Center, Tokyo, Japan, Dec. 13-17, 2017

Superconducting quantum metamaterial

Kouichi Semba (Invited)

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

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,

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

Time-domain measurements and control pf a qubit-oscillator coupled circuit in ultra-strong coupling regime

Tomoko Fuse, Fumiki Yoshihara, , Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Kouichi Semba

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

How Strong can the interaction between a superconducting qubit and an electromagnetic field be?

Kouichi Semba（Invited）, The 56th meeting of The Japan Society of Applied Physics, Atto Business Center Tokyo, Dec. 1, 2017

Superradiance phase transition in the presence of parameter fluctuations

Kouichi Semba(Contributed Talk), S. Ashhab

WINDS2017, Hapuna Beach Prince Hotel Kohala Coast, Hawaii, USA, Nov. 26-Dec. 1, 2017

Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime

Fumiki Yoshihara(Contributed Talk), Tomoko Fuse, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Kouichi

Semba

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, and 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, and 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, and K. Semba

Giant Lamb shift observed in deep-strongly-coupled superconducting qubit-oscillator circuit

ISNTT2017

NTT Basic Reasearch Laboratories, Nov, 13-17, 2017

Twists of qubit energy levels in deep-strongly-coupled qubit-oscillator circuits

Fumiki YOSHIHARA, Tomoko Fuse, Ao Ziqiao, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito, Takao, Aoki,

and Kouichi Semba

Quantum Theory&Technology Un-official Meeting 2017

Oct. 7-8, 2017, Hokkaido University

F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito, and 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, and 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 https://www.grc.org/programs.aspx?year=2012&program=quantsci

**Others**

K. Kakuyanagi, S. Kagei, S. Saito, H. Nakano, and 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)

Tomoko Fuse, Fumiki Yoshihara, Kosuke Kakuyanagi, and 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)