Welcome to the Homepage of SIT Quantum Information Science

◇ Books

  1. 量子の不可解な偶然 ー非局所性の本質と量子情報科学への応用ー, N. ジザン(著)，木村元，筒井泉（訳）（共立出版，2022）.
  2. Introduction to Quantum Information Science, M. Hayashi, S. Ishizaka, A. Kawachi, G. Kimura, T. Ogawa (Springer, 2015).
  3. 量子情報科学入門, 石坂 智, 小川 朋宏, 河内 亮周, 木村 元, 林 正人 (共立出版, 2012).
  4. マーミン 量子コンピュータ科学の基礎, N. D. マーミン(著), 木村元(訳) (丸善, 2009).
  5. Decoherence Suppression in Quantum Systems 2008, Edited by: M. Nakahara, R. Rahimi, A. SaiToh, Chapt.1 G. Kimura (World Scientific, 2008).

◇ Articles

  1. 量子力学の基礎問題 ～ 現状と新たな展開 ～：木村 元(数理科学, 2025年1月号)
  2. ベルの不等式が問いかける 実在・局所性・自由意志, 語り：木村 元　聞き手：古田 彩(日経サイエンス, 2023年12月号)
  3. （巻頭言）若き（？）物理学者の悩み：木村 元(数理科学, 2023年5月号)
  4. 本に導かれて：木村 元(日経サイエンス, 2022年5月号)
  5. QBism 量子×ベイズ――量子情報時代の新解釈, H. C. フォン・バイヤー(著), 松浦俊輔(訳), 木村元(解説) (森北出版, 2018).
  6. 量子力学に現れる非局所性の意味, 木村元 (数理科学, 2014年12月号).
  7. 情報から生まれる量子力学, 木村元 (日経サイエンス, 2013年7月号) ; 量子の逆説（日経サイエンス, 細谷曉夫 編, 2014）に再掲.
  8. 量子力学の原理を求めて, 木村元 (数理科学, 2009年12月号).
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◇ Papers

  1. Universal bound on the relaxation rates for quantum Markovian dynamics,
    Paolo Muratore-Ginanneschi, Gen Kimura, Dariusz Chruściński, arXiv:2409.00436 (2024), to appear in J. Phys. A: Math. Theor.
  2. Uncertainty relations based on state-dependent norm of commutator,
    Aina Mayumi, Gen Kimura, Hiromichi Ohno, Dariusz Chruscinski, Phys. Rev. A 110, 062215 (2024).
  3. Böttcher-Wenzel inequality for weighted Frobenius norms and its application to quantum physics,
    Aina Mayumi, Gen Kimura, Hiromichi Ohno, Dariusz Chruscinski, Linear Algebra and its Appl. 700, 35-49 (2024).
  4. Universal constraint for relaxation rates of semigroups of qubit Schwarz maps,
    Dariusz Chruscinski, Gen Kimura and Farrukh Mukhamedov, J. Phys. A: Math. Theor. 57 185302 (2024).
  5. Trade-off relations between measurement dependence and hiddenness for separable hidden variable models,
    Ryo Takakura, Kei Morisue, Issei Watanabe, Gen Kimura, arXiv:2208.13634.
  6. One parameter generalization of BW inequality and its application to open quantum dynamics,
    Dariusz Chruscinski, Gen Kimura, Hiromichi Ohno, Tanmay Singal, Linear Algebra Appl. 656, 158-166 (2023).
  7. Relaxed Bell inequalities as a tradeoff relation between measurement dependence and hiddenness,
    Gen Kimura, Yugo Susuki, Kei Morisue, Phys. Rev. A 108, 022214 (2023).
  8. Construction of general SIC POVMs by using a complete orthogonal basis,
    Masakazu Yoshida and Gen Kimura, Phys. Rev. A 106, 022408 (2022).
  9. Bounding the Frobenius norm of a q-deformed commutator,
    Dariusz Chruscinski, Gen Kimura, Hiromichi Ohno, Tanmay Singal, Linear Algebra Appl. 646, 95-106 (2022).
  10. Constraints for the spectra of generators of quantum dynamical semigroups,
    Dariusz Chruscinski, Ryohei Fujii, Gen Kimura, Hiromichi Ohno, Linear Algebra Appl. 630, 293-305 (2021).
  11. On the universal constraints for relaxation rates for quantum dynamical semigroup,
    Dariusz Chruscinski, Gen Kimura, Andrzej Kossakowski, Yasuhito Shishido, Phys. Rev. Lett. 127, 050401 (2021).
  12. Entanglement extracted from vacuum into accelerated Unruh-DeWitt detectors and energy conservation,
    Jun-ichirou Koga, Kengo Maeda, Gen Kimura, Phys. Rev. D 100, 065013 (2019).
  13. Quantum teleportation in vacuum only via Unruh-DeWitt detectors,
    Jun-ichirou Koga, Gen Kimura, Kengo Maeda, Phys. Rev. A 97, 062338 (2018).
  14. Information storing yields a point-asymmetry of state space in general probabilistic theories,
    Keiji Matsumoto, Gen Kimura, arXiv:1802.01162.
  15. Universal Constraints on Relaxation Times for d-Level GKLS Master Equations,
    Gen Kimura, Shigeru Ajisaka, Kyohei Watanabe, Open Syst. Inf. Dyn. 24, 1740009 (2017).
  16. Entropies in General Probabilistic Theories and its Application to Holevo Bound,
    Gen Kimura, Junji Ishiguro, Makoto Fukui, Phys. Rev. A 94, 042113 (2016).
  17. Solution to the mean king's problem using quantum error-correcting codes,
    Masakazu Yoshida, Gen Kimura, Takayuki Miyadera, Hideki Imai, Jun Cheng, Phys. Rev. A 91, 52326 (2015).
  18. On affine maps on non-compact convex sets and some characterizations of finite-dimensional solid ellipsoids,
    Gen Kimura, Koji Nuida, J. Geom. Phys. 86, 1 (2014).
  19. Determining eigenvalues of a density matrix with minimal information in a single experimental setting,
    Tohru Tanaka, Yukihiro Ota, Mitsunori Kanazawa, Gen Kimura, Hiromichi Nakazato, Franco Nori, Phys. Rev. A 89, 012117 (2014).
  20. Walter Lewin 先生の公開授業 --- ネット配信される大学の授業,
    峰 真如, 木村 元, 日本物理学会, 68, 7 (2013).
  21. Possibility of a minimal purity measurement scheme critically depends on the parity of dimension of the quantum system,
    Toru Tanaka, Gen Kimura, Hiromichi Nakazato, Phys. Rev. A 87, 12303 (2013).
  22. 量子力学の原理探究,
    木村元, 科学基礎論研究, 40, 23 (2013).
  23. On the general property of correlation (Perspectives of Nonequilibrium Statistical Physics-The Memory of Professor Shuichi Tasaki),
    Gen Kimura, Shuich Tasaki, Bussei, 97, 3, 421 (2011).
  24. Lazy states: sufficient and necessary condition for zero quantum entropy rates under any coupling to the environment,
    Cesar A. Rodriguez-Rosario, Gen Kimura, Hideki Imai, Alan Aspuru-Guzik, Phys. Rev. Lett. 97, 421 (2011).
  25. Distinguishability Measures and Entropies for General Probabilistic Theories,
    Gen Kimura, Koji Nuida, Hideki Imai, Rep. Math. Phys. 106, 050403 (2011).
  26. Relation between the Dynamics of the Reduced Purity and Correlations,
    Gen Kimura, Hiromichi Ohno, Milan Mosonyi, Open. Sys. Info. Dyn. 17, 233 (2010).
  27. Optimal Observables for Minimum-Error State Discrimination in General Probabilistic Theories,
    Koji Nuida, Gen Kimura, Takayuki Miyadera, J. Math. Phys. 51, 093505 (2010).
  28. Optimal state discrimination in general probabilistic theories,
    Gen Kimura, Takayuki Miyadera, Hideki Imai, Phys. Rev. A 79, 62306 (2009).
  29. Quantum limits of measurements induced by multiplicative conservation laws: Extension of the Wigner-Araki-Yanase theorem,
    Gen Kimura, Bernhard K. Meister, Masanao Ozawa, Phys. Rev. A 78, 032106 (2008).
  30. How to detect a possible correlation from the information of a sub-system in quantum mechanical systems,
    Gen Kimura, Hiromichi Ohno, Hiroyuki Hayashi, Phys. Rev. A 76, 42123 (2007).
  31. Comments on “Best conventional solutions to the King's problem,
    Gen Kimura, Hajime Tanaka, Masanao Ozawaw, Z. Naturforsch 62a, 152 (2007).
  32. On the assumption of initial factorization in the master equation for weakly coupled systems II: Solvable models,
    Kazuya Yuasa,Shuichi Tasaki,Paolo Facchi,Gen Kimura, Hiromichi Nakazato,Ichiro Ohba, Annals of Physics, 322, 657 (2007).
  33. On the assumption of initial factorization in the master equation for weakly coupled systems I:General framework,
    Shuichi Tasaki,Kazuya Yuasa,Paolo Facchi,Gen Kimura, Hiromichi Nakazato,Ichiro Ohba, Annals of Physics, 322, 631 (2007).
  34. Solution to the Mean King's problem with mutually unbiased bases for arbitrary levels,
    Gen Kimura, Hajime Tanaka, Masanao Ozawaw, Phys. Rev. A 73, 050301 (2006).
  35. The Bloch-vector space for N-level systems -- the spherical-coordinate point of view,
    Gen Kimura, Andrzej Kossakowski, Open. Sys. Info. Dyn. 12, 207 (2005).
  36. A Note on Positive Maps and Classification of States,
    Gen Kimura, Andrzej Kossakowski, Open. Sys. Info. Dyn. 12, 1 (2005).
  37. A Class of Linear Positive Maps in Matrix Algebras II,
    Gen Kimura, Andrzej Kossakowski, Open. Sys. Info. Dyn. 11, 343 (2004).
  38. Kraus representation in the presence of initial correlations,
    Hiroyuki Hayashi, Gen Kimura, Yukihiro Ota, Phys. Rev. A 67, 062109 (2003).
  39. The Bloch Vector for N-Level Systems,
    Gen Kimura, Phys. Lett. A 313, 339 (2003).
  40. The Bloch Vector for N-Level Systems,
    Gen Kimura, J. Soc. Japan, 72, 185 (2003).
  41. Restriction on relaxation times derived from the Lindblad-type master equations for 2-level systems,
    Gen Kimura, Phys. Rev. A 66, 062113 (2002).
  42. 量子開放系のダイナミクスにおける完全正値性の役割,
    木村元, 物性研究, 79, 81 (2002).
  43. Bifurcation Phenomenon in a Spin Relaxation,
    Gen Kimura, Kazuya Yuasa, Kentaro Imafuku, Phys. Rev. Lett. 89, 140403 (2002).
  44. Stochastic limit approximation for rapidly decaying systems,
    Gen Kimura, Kazuya Yuasa, Kentaro Imafuku, Phys. Rev. A 63, 022103 (2001).