Macroscopic Quantum Physics Research Project
Introduction
The Macroscopic Quantum Physics Project team aims to unveil novel phenomena that are useful for advanced information and communications technology.
Our research focuses on three main topics:
Our research focuses on three main topics:
(1) Novel materials and designs of superconducting quantum information and communications devices.
(2) Optimal control of quantum information devices.
(3) Hybrid quantum systems composed of superconducting artificial atoms and microwave frequency photons interacting at the single quantum level.
(2) Optimal control of quantum information devices.
(3) Hybrid quantum systems composed of superconducting artificial atoms and microwave frequency photons interacting at the single quantum level.
News
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The article "Properties and dynamics of generalized squeezed states" by Sahel Ashhab and Mohammad Ayyash, has been published in New Journal of Physics, (13 May, 2025 ) |
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The article "Optimal control in nearly adiabatic two-level quantum systems via time-dependent resonance" by Takayuki Suzuki, has been published in Physical Review A, 111, L050201 (09 May, 2025 ) |
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The article "Development of Superconducting Qubits Based on Nitride Superconductors " by Hirotaka Terai, Sunmi Kim, Taro Yamashita, Kunihiro Imomata and Kouichi Semba, has been published in Vacuum and Surface Science, 68, 3 (10 March, 2025 ) |
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The article "CP Conditions for GKSL-Like Master Equations" by Akane Watanabe, Makoto Unoki, Hiromichi Nakazato, and Takayuki Suzuki, has been published in Open Systems & Information Dynamics, 31, 2450017 (30 December, 2024 ) |
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The article "Development of a highly sensitive detection module incorporating a charge-sensitive infrared phototransistor and a Ge hemispherical mirror" by Souichi Nakai, Fumiyuki Inamura, Sunmi Kim, Mikhail Patrashin, Iwao Hosako, Susumu Komiyama and Kenji Ikushima, has been published in Japanese Journal of Applied Physics, 63, 12SP15 (23 December, 2024) |
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The article "Loss Mechanisms of Epitaxial NbN Coplanar Waveguide Resonators on an MgO Substrate" by Kohki Watanabe, Hiroki Kutsuma, Sunmi Kim and Taro Yamashita, has been published in IEEE Transactions on Applied Superconductivity, 35, 1700205 (9 December, 2024) |
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The article "Exact survival probability of a time-dependent open Ising chain at zero temperature" by Takayuki Suzuki, has been published in Physical Review Research 6, 043239 (5 December, 2024) |
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The article "Driven multiphoton qubit-resonator interactions" by Mohammad Ayyash, Xicheng Xu, Sahel Ashhab, and M. Mariantoni, has been published in Physical Review A 110, 053711 (19 November, 2024) |
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The article "Landau-level terahertz emission from electrically biased graphene" by Fumiyuki Inamura, Gen Ueda, Sunmi Kim, Mikhail Patrashin, Iwao Hosako, Susumu Komiyama, and Kenji Ikushima, has been published in APL Photonics 9, 116101 (01 November, 2024) |
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The article "Superconducting flux qubit with ferromagnetic Josephson π-junction operating at zero magnetic field" by Sunmi Kim, Leonid V. Abdurakhimov, Duong Pham, Wei Qiu, Hirotaka Terai, Sahel Ashhab, Shiro Saito, Taro Yamashita, Kouichi Semba, has been published in Communications Materials 5, 216 (11 Octover, 2024) |
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The article "Analytical derivation and extension of the anti-Kibble-Zurek scaling in the transverse field Ising model" by Kaito Iwamura, Takayuki Suzuki, has been published in Physical Review B 110, 144102 (4 October, 2024) |
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Dr. Takayuki Suzuki joined our group (1 April, 2024) |
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The article "Using machine learning to find exact analytic solutions to analytically posed physics problems" by Sahel Ashhab has been published in Heliyon 10, e28124 (2024). (30 March, 2024) |
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The article "High-frequency suppression of inductive coupling between flux qubit and transmission line resonator" by Sahel Ashhab, Ziqiao Ao, Fumiki Yoshihara, Adrian Lupascu, Kouichi Semba, has been published in Physica Scripta 99, 045116 (2024). (18 March, 2024) |