【所属】　東京科学大学　リベラルアーツ研究教育院 (272-0827 市川市国府台2-8-30)

【電子メール】　ikuzak.las_[at]_tmd.ac.jp (_[at]_を@に置換してください)
【学歴】　東京大学大学院理学系研究科物理学専攻博士課程修了(2000 .3)
【学位】　博士(理学)　 (東京大学) 2000.3

【専門分野】 量子光学・光物性理論
【職歴】　
　　　　2000.4 - 2003.3　 理化学研究所フロンティア研究システム研究員
　　　　2003.4 - 2005.3　 科学技術振興機構　戦略的創造研究推進事業　研究員
　　　　2005.4 - 2007.3　 和歌山大学　システム工学部　精密物質学科　助手
　　　　2006.10- 2010.3　（兼務） 科学技術振興機構 戦略的創造研究推進事業（さきがけ） 「光の創成・操作と展開」領域研究者
　　　　2007.4 - 2024.9　 東京医科歯科大学 教養部 准教授
　　　　2024.10 - 　　　　東京科学大学 リベラルアーツ研究教育院 准教授

【受賞】　日本物理学会 第1回若手奨励賞(領域11)
　　　　　 第22回　超伝導科学技術賞

• 越野和樹
  共振器量子電磁力学 ―量子コンピュータのハードウェア理論―
  サイエンス社， 2020年9月25日発行，200ページ，ISBN 9784781914879
  紹介ページ（サイエンス社）
  
  補足・誤植など

• 秋光純，秋光正子，松川宏，越野和樹
  基礎物理学　力学
  培風館， 2016年11月25日発行，200ページ，ISBN 9784563025137
  

• Kazuki Koshino
  Galvanically connected tunable coupler between a cavity and a waveguide
  New Journal of Physics 27 (2025) 043001.

• Shimpei Goto and Kazuki Koshino
  Labeling Eigenstates of Qubit-Cavity Systems Based on the Continuity of Qubit Occupancy: Detecting Resonances to Higher Excited Qubit States
  Journal of the Physical Society of Japan 94 (2025) 014002.

• Kazuki Koshino and Kunihiro Inomata
  Bidirectional state transfer between superconducting and microwave-photon qubits by single reflection
  Physical Review Applied 21 (2024) 054049.

プレスリリース : 超伝導人工原子・マイクロ波光子間の単一反射による量子ビット交換

• Byunggi Kim, Hodaka Kurokawa, Katsuta Sakai, Kazuki Koshino, Hideo Kosaka, and Masahiro Nomura
  Diamond optomechanical cavity with a color center for coherent microwave-to-optical quantum interfaces
  Physical Review Applied 20 (2023) 044037.

• Shimpei Goto and Kazuki Koshino
  Efficient numerical approach for the simulations of high-power dispersive readout with time-dependent unitary transformation
  Physical Review A 108 (2023) 033722.

• 設楽智洋，越野和樹
  超強結合〜深強結合領域における共振器量子電磁力学
  日本物理学会誌 第78巻 第3号 (2023) 125--134.
  

• Ivan Iakoupov and Kazuki Koshino
  Saturable Purcell filter for circuit quantum electrodynamics
  Physical Review Research 5 (2023) 013148.

• Rui Asaoka, Julio Gea-Banacloche, Yuuki Tokunaga, and Kazuki Koshino
  Stimulated Emission of Superradiant Atoms in Waveguide Quantum Electrodynamics
  Physical Review Applied 18 (2022) 064006.

• T. Yamaji, S. Kagami, A. Yamaguchi, T. Satoh, K. Koshino, H. Goto, Z. R. Lin, Y. Nakamura, and T. Yamamoto
  Spectroscopic observation of the crossover from a classical Duffing oscillator to a Kerr parametric oscillator
  Physical Review A 105 (2022) 023519.

• K. Koshino, T. Shitara, Z. Ao, and K. Semba
  Deterministic three-photon down-conversion by a passive ultrastrong cavity-QED system
  Physical Review Research 4 (2022) 013013.

• T. Shitara, M. Bamba, F. Yoshihara, T. Fuse, S. Ashhab, K. Semba and K. Koshino
  Nonclassicality of open circuit QED systems in the deep-strong coupling regime
  New Journal of Physics 23 (2021) 103009.

• Kazuki Koshino
  Elliptical rotation of a bosonic oscillator in ultrastrong waveguide QED
  Physical Review Research 3 (2021) 023060.

• Shumpei Masuda and Kazuki Koshino
  Effects of higher levels of qubits on control of qubit protected by a Josephson quantum filter
  New Journal of Physics 23 (2021) 013006.

• S. Kono, K. Koshino, D. Lachance-Quirion, A. F. van Loo, Y. Tabuchi, A. Noguchi, and Y. Nakamura,
  Breaking the trade-off between fast control and long lifetime of a superconducting qubit
  Nature Communications 11 (2020) 3683.

• J. Ilves, S. Kono, Y. Sunada, S. Yamazaki, M. Kim, K. Koshino, and Y. Nakamura
  On-demand generation and characterization of a microwave time-bin qubit
  npj Quantum Information 6 (2020) 34.

• Kazuki Koshino, Shingo Kono, and Yasunobu Nakamura
  Protection of a Qubit via Subradiance: A Josephson Quantum Filter
  Physical Review Applied 13 (2020) 014051.

プレスリリース : 超放射で量子ビットを守る ― 量子ビット寿命の原理的限界を打破 ―
EurekAlert : A filter for cleaner qubits

• Shumpei Masuda, Shingo Kono, Keishi Suzuki, Yuuki Tokunaga, Yasunobu Nakamura, and Kazuki Koshino
  Nonreciprocal microwave transmission based on Gebhard-Ruckenstein hopping
  Physical Review A 99 (2019) 013816.

• Shingo Kono, Kazuki Koshino, Yutaka Tabuchi, Atsushi Noguchi, Yasunobu Nakamura
  Quantum non-demolition detection of an itinerant microwave photon
  Nature Physics 14 (2018) 546.

プレスリリース : マイクロ波光子を吸収せず検出することに成功

• F. Yoshihara, T. Fuse, Z. Ao, S. Ashhab, K. Kakuyanagi, S. Saito, T. Aoki, K. Koshino, and K. Semba
  Inversion of Qubit Energy Levels in Qubit-Oscillator Circuits in the Deep-Strong-Coupling Regime
  Physical Review Lett. 120 (2018) 183601.

プレスリリース : 光子との相互作用を使った超伝導人工原子の自在なエネルギー制御が可能に

• S. Kono, Y. Masuyama, T. Ishikawa, Y. Tabuchi, R. Yamazaki, K. Usami, K. Koshino, and Y. Nakamura
  Nonclassical Photon Number Distribution in a Superconducting Cavity under a Squeezed Drive
  Physical Review Lett. 119 (2017) 023602.

• K. Koshino, K. Inomata, Z. R. Lin, Y. Tokunaga, T. Yamamoto, and Y. Nakamura
  Theory of Deterministic Entanglement Generation between Remote Superconducting Atoms
  Physical Review Applied 7 (2017) 064006.
  Editor's Suggestion

• K. Inomata, Z. R. Lin, K. Koshino, W. D. Oliver, J. S. Tsai, T. Yamamoto and Y. Nakamura
  Single microwave-photon detector using an artificial Λ-type three-level system
  Nature Communications 7 (2016) 12303.

プレスリリース : マイクロ波単一光子の高効率検出を実現

• K. Koshino, Z. Lin, K. Inomata, T. Yamamoto and Y. Nakamura
  Dressed-state engineering for continuous detection of itinerant microwave photons
  Physical Review A 93 (2016) 023824.

• K. Koshino, K. Inomata, Z. Lin, Y. Nakamura and T. Yamamoto
  Theory of microwave single-photon detection using an impedance-matched Λ system
  Physical Review A 91 (2015) 043805.

• 越野和樹，猪股邦宏，中村泰信，山本　剛
  単一光子による決定論的な量子状態スイッチング
  日本物理学会誌 第69巻 第12号 (2014) 870.
  

• K. Inomata, K. Koshino, Z. R. Lin, W. D. Oliver, J. S. Tsai, Y. Nakamura and T. Yamamoto
  Microwave Down-Conversion with an Impedance-Matched Λ System in Driven Circuit QED
  Physical Review Letters 113 (2014) 063064.
  Editor's Suggestion

• Z. R. Lin, K. Inomata, K. Koshino, W. D. Oliver, Y. Nakamura, J. S. Tsai and T. Yamamoto
  Josephson parametric phase-locked oscillator and its application to dispersive readout of superconducting qubits
  Nature Communications 5 (2014) 4480.

プレスリリース : 超伝導回路を用いてパラメトロンを実現
日刊工業新聞 (詳細)

• E. Iyoda, T. Kato, K. Koshino and T. Martin
  Dephasing in single-electron generation due to environmental noise probed by Hong-Ou-Mandel interferometry
  Physical Review B 89 (2014) 205318.

• K. Koshino and T. Aoki
  Guided resonance fluorescence of a single emitter after pulsed excitation
  Physical Review A 89 (2014) 023814.

• T. Yamamoto, K. Inomata, K. Koshino, P.-M. Billangeon, Y. Nakamura and J. S. Tsai
  Superconducting flux qubit capacitively coupled to an LC resonator
  New Journal of Physics 16 (2014) 015017.

• K. Koshino, K. Inomata, T. Yamamoto and Y. Nakamura
  Theory of deterministic down-conversion of single photons occurring at an impedance-matched Λ system
  New Journal of Physics 15 (2013) 115010.

• K. Koshino, K. Inomata, T. Yamamoto and Y. Nakamura
  Implementation of an Impedance-Matched Λ System by Dressed-State Engineering
  Physical Review Letters 111 (2013) 153601.

• Z. R. Lin, K. Inomata, W. D. Oliver, K. Koshino, Y. Nakamura, J. S. Tsai, and T. Yamamoto
  Single-shot readout of a superconducting flux qubit with a flux-driven Josephson parametric amplifier
  Applied Physics Letters 103 (2013) 132602.

• K. Koshino, H. Terai, K. Inomata, T. Yamamoto, W. Qiu, Z. Wang, and Y. Nakamura
  Observation of three-state dressed states in circuit quantum electrodynamics
  Physical Review Letters 110 (2013) 263601.

• E. Iyoda, T. Kato, T. Aoki, K. Edamatsu and K. Koshino
  Properties of a Single Photon Generated by a Solid-State Emitter: Effects of Pure Dephasing
  Journal of the Physical Society of Japan 82 (2013) 014301.

• K. Koshino and Y. Matsuzaki
  Entangling homogeneously broadened matter qubits in the weak-coupling cavity-QED regime
  Physical Review A 86 (2012) 020305(R).

• K. Koshino and Y. Nakamura
  Control of the radiative level shift and linewidth of a superconducting artificial atom through a variable boundary condition
  New Journal of Physics 14 (2012) 043005.

• K. Koshino
  Theory of resonance fluorescence from a solid-state cavity QED system: Effects of pure dephasing
  Physical Review A 84 (2011) 033824.

• M. Nakatani, R. Shimizu and K. Koshino
  Up-conversion dynamics for temporally entangled two-photon pulses
  Physical Review A 83 (2011) 013824.

• K. Yoshimi and K. Koshino
  Photon statistics of atomic fluorescence after π-pulse excitation
  Physical Review A 82 (2010) 033818.

• K. Koshino, S. Ishizaka and Y. Nakamura
  Deterministic photon-photon (SWAP)^1/2 gate using a Λ system
  Physical Review A 82 (2010) 010301(R).

Highlighted by APS Physics : Atomic Middle Man

• K. Yoshimi and K. Koshino
  Evaluation of multiphoton effects in down-conversion
  Physical Review A 81 (2010) 043806.

• K. Koshino
  Conditional sign flip of two photons without pulse distortion
  Physical Review A 80 (2009) 023813.

• K. Koshino and M. Nakatani
  Theoretical method for analyzing quantum dynamics of correlated photons
  Physical Review A 79 (2009) 055803.

• M. Nakatani, R. Shimizu and K. Koshino
  Multimode Theory of Up-Conversion of Two Photons
  Journal of the Physical Society of Japan 78 (2009) 054401.

• K. Koshino
  Down-conversion of a single photon with unit efficiency
  Physical Review A 79 (2009) 013804.

• K. Koshino
  Multiphoton wave function after Kerr interaction
  Physical Review A 78 (2008) 023820.

• K. Koshino
  Single-photon filtering by a cavity quantum electrodynamics system
  Physical Review A 77 (2008) 023805.

• K. Koshino
  Novel Method for Solving the Quantum Nonlinear Dynamics of Photons: Use of a Classical Input
  Physical Review Letters 98 (2007) 223902.

• K. Koshino
  Transitional behavior between self-Kerr and cross-Kerr effects by two photons
  Physical Review A 75 (2007) 063807.

• K. Koshino
  Semiclassical evaluation of two-photon cross-Kerr effect
  Physical Review A 74 (2006) 053818.

• K. Koshino
  Squeezing in the output field from a one-dimensional atom
  Journal of Physics B: Atomic, Molecular and Optical Physics 39 (2006) 4853.

• K. Koshino
  Evaluation of cavity quantum electrodynamics parameters for a planar-cavity geometry
  Physical Review A 73 (2006) 053814.

• K. Koshino and H. Ishihara
  Two-photon nonlinear interaction mediated by cavity quantum electrodynamics systems
  International Journal of Modern Physics B 20 (2006) 2451.

• K. Koshino and A. Shimizu
  Quantum Zeno effect by general measurements
  Physics Reports 412 (2005) 191.

• K. Koshino and H. Ishihara
  Two-photon nonlinearity by an excitonic system placed in a cavity
  Physical Review A 71 (2005) 063818.

• K. Koshino
  Relation between conventional and dynamical formalisms in the quantum Zeno effect
  Physical Review A 71 (2005) 034104.

• K. Koshino and H. Ishihara
  Evaluation of two-photon nonlinearity by semiclassical method
  Physical Review Letters 93 (2004) 173601.

• K. Koshino and H. Ishihara
  Two-photon nonlinearity in general cavity QED systems
  Physical Review A 70 (2004) 013806.

• K. Koshino
  Quantum anti-Zeno effect by false measurements
  Physical Review Letters 93 (2004) 030401.

• K. Koshino and A. Shimizu
  Quantum Zeno effect for exponentially decaying systems
  Physical Review Letters 92 (2004) 030401.

• K. Koshino and A. Shimizu
  Quantum Zeno and anti-Zeno effects by indirect measurement with finite errors
  Physical Review A 67 (2003) 042101.

• T. Ishihara, K. Koshino and H. Nakashima
  Second Harmonic Generation due to Quadrupole Interaction in a Photonic Crystal Slab: Angle Dependence and Symmetry of the Unit Cell
  Physical Review Letters 91 (2003) 253901.

• K. Koshino
  Analytic approach to optical response of one-dimensional photonic crystal slabs
  Physical Review B 67 (2003) 165213.

• K. Koshino and T. Ogawa
  Electronic phase conversion by photoinjection of excitations
  Physical Review B 61 (2000) 12101.

• Y. Ogawa, A. Mino, S. Koshihara, K. Koshino, T. Ogawa, C. Urano and H. Takagi
  Dynamical aspects of the photoinduced phase transition in spin-crossover complexes
  Physical Review Letters 84 (2000) 3181.