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Superconducting Qubit
Quantum Gate Sequence
DSC Spectrum

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:
(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.

News

Research Result 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 )
Research Result 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)
Research Result 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)
Research Result 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)
Research Result 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)
Research Result 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)
Research Result 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)
Research Result 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)
New Member Dr. Takayuki Suzuki joined our group (1 April, 2024)
Research Result 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)
Research Result 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)