• FONTS
  • FONTS

English / Japanese

School of Information Science and Technology :
Department of Information Science and Technology

USUDA Tsuyoshi Sasaki
Position Professor
Degrees Ph. D.
Last academic career Doctor course at Tamagawa University
Areas of study Quantum Information Science
Themes of research
  1. Coding and decoding in quantum information theory
  2. Quantum information security (quantum cryptography)
  3. Realization of quantum circuit for quantum communication and computer
Research achievement
  1. K. Nakahira and T. S. Usuda, Quantum measurement for group covariant state set, Phys. Rev., vol.A87, no.1, 012308, (2013). doi: 10.1103/PhysRevA.87.012308
  2. K. Nakahira and T. S. Usuda, Minimum-error discrimination between self-symmetric mixed quantum state signals, IEEE Trans. on Inform. Theory, vol.58, no.2, pp.1215-1222, (2012). doi: 10.1109/TIT.2011.2170954
  3. T. S. Usuda and K. Shiromoto, Analytical expression of s-th power of Gram matrix for group covariant signals and its application, in Quantum Communication, Measurement and Computing (QCMC), AIP Conference Proceedings vol.1363, T. Ralph and P.K. Lam (Eds.), American Institute of Physics, New York, pp.97-100, (2011). doi: 10.1063/1.3630156
  4. T. S. Usuda, S. Usami, I. Takumi, and M. Hata, Superadditivity in capacity of quantum channel for q-ary linearly dependent real symmetric-state signals, Phys. Lett., vol.A305, pp.125-134, (2002). doi: 10.1016/S0375-9601(02)01413-5
  5. T. S. Usuda, T. Satoh, K. Yamazaki, and O. Hirota, Signal-to-noise ratio of optical system consisting of squeezer and optical Kerr medium, J. Mod. Opt., vol.41, no.12, pp.2275-2289, (1994). doi: 10.1080/09500349414552131
Academic associations
  1. IEEE (The Institute of Electrical and Electronics Engineers)
  2. APS (American Physical Society)
  3. OSA (Optical Society of America)
  4. IEICE (The Institute of Electrical and Electronics Engineers)
  5. IEEJ (The Institute of Electrical Engineers of Japan)
Academic /social activities
  1. The 1st International Workshop on Entangled Coherent State and Its Application to Quantum Information Science, Organizing committee (Co-Chair)
  2. The 8th International Conference on Quantum Communication, Measurement and Computing, Local committee
Awards Young Scientist Award for the Presentation of an Excellent Paper in The Society of Information Theory and Its Applications (Soc. ITA)
Mail Address usuda[at]ist.aichi-pu.ac.jp
([at]: replaced by @)
Original Website http://www.ist.aichi-pu.ac.jp/person/usuda/index-e.html

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