A CCEPTED    P APERS
2001

  1. M.Sohma and O.Hirota,

  2. Information capacity formula of quantum optical channels,
    Recent research development in physics, , Ref No:TRN/PHY/J/H0015, June 2001.


P UBLISHED    P APERS
2002
  1. M.Sohma and O.Hirota,

  2. Squeezing is good at low information rate,
    Physical Review A, vol.65, no-2, 022319 , 2002.

2001
  1. S. van Enk and O.Hirota,

  2. Entangled coherent state: teleportation and decoherence,
    Physical Review A, , vol.64, no-2, 022313, 2001.

  3. K.Kurokawa and O.Hirota,

  4. Properties of quantum reliability function and its applications to several quantum signals,
    Electronics and communications in Japan, Part 3,2001 , vol.84, no.9, pp.31-41, 2001.

    2000

    1. A.Tomita and O.Hirota,

    2. Security of classical noise-based cryptography,
      Journal of Optics B , vol.2, no.6, pp.705-710, 2000.

    3. A.S.Holevo, M.Sohma, and O.Hirota,

    4. Error exponents for quantum channels with constrained inputs,
      Report on Mathematical Physics vol.46, no.3, pp.343-358, 2000.

    5. M.Sohma and O.Hirota,

    6. Binary discretization for quantum continuous channels,
      Physical Review A. vol.62, no.5, pp.052312-1-4, 2000.

    7. O.Hirota,

    8. A foundation of quantum channels with super additiveness for Shannon information,
      Applicable Algebra in Eng. Communication and Computing , vol-10, no.4/5, pp.401-423, 2000.

    9. K.Kurokawa and O.Hirota,

    10. Properties of quantum reliability function and its applications to several quantum signals,
      Transactions of the IEICE A, vol.J83-A, no.1, pp.57-66, 2000. (in Japanese)
    1999

    1. T.S.Usuda, I.Takumi, M.Hata, and O.Hirota,

    2. Minimum error detection of classical linear code sending through a quantum channel,
      Physics Letters. A, 256, pp.104-108, 1999.

    3. M.Sasaki, S.Barnett, R.Jozsa, M.Osaki, and O.Hirota,

    4. Accessible information and optimal strategies for real symmetrical quantum sources,
      Physical Review. A vol.59, no.5, pp.3325-3335, 1999.

    5. M.Ban, K.Kurokawa, and O.Hrota,

    6. Cut-off rate performance of quantum communication channels with symmetric states,
      Journal of Optics B; Quantum and Semiclassical Optics, vol-1, pp.206-218, 1999.

    7. A.S.Holevo, M.Sohma, and O.Hirota,

    8. Capacity of quantum Gaussian channels,
      Physical Review A, vol.59, no.3, pp.1820-1828, 1999.

    9. K.Kato, M.Osaki, and O.Hirota,

    10. Derivation of classical capacity of quantum channel for discrete information source,
      Physics Letters A, 251, pp.157-163, 1999.

    11. K.Kato, M.Osaki, M.Sasaki, and O.Hirota,

    12. Quantum detection and mutual information for QAM and PSK signals,
      IEEE Transactions on communications, vol.47, no.2, 1999.
    1998

    1. M.Osaki, T.S.Usuda and O.Hirota,

    2. Group covariant detection for a three-phase shift keyed signal,
      Physics Letters A, 245, pp.189-196,1998.

    3. M.Ban, K.Kurokawa, and O.Hirota,

    4. Cut-off rate for quantum communication channels with entangled measurement,
      Quantum and Semiclassical Optics, 10, pp.7-12, 1998.

    5. M.Sasaki, K.Kato, M.Izutsu, and O.Hirota,

    6. Quantum channels showing superadditivity in classical capacity,
      Physical Review A, vol.58, no.1, 1998.

    7. M.Sasaki, T.S.Usuda, M.Izutsu, and O.Hirota,

    8. Realization of a collective decoding of code-word states,
      Physical Review A, vol.58, no.1, 1998.

    9. M.Osaki, M.Ban, and O.Hirota,

    10. The maximum mutual information without coding for binary quantum state signals,
      Journal of Modern Optics, vol.45, no.2, pp.269-282, 1998.
    1997

    1. M.Sasaki, R.Momose, and O.Hirota,

    2. Quantum detection for on-off keyed mixed state with small amount of thermal noise,
      Physical Review A, vol.55, no.4, pp.3222-3225, 1997.

    3. M.Ban, K.Kurokawa, R.Momose, and O.Hirota,

    4. Optimum measurements for discrimination among symmetric quantum states and parameter estimation,
      International Journal of Theoretical Physics, vol.36, no.6, pp.1269-1288, 1997.

    5. M.Sasaki, K.Kato, M.Izutsu, and O.Hirota,

    6. A demonstration of superadditivity in the classical capacity of a quantum channel,
      Physics Letters A, vol.236, pp.1-4, 1997.

    7. M.Sasaki, R.Momose, and O.Hirota,

    8. Quantum detection for on-off keyed mixed-state signals with a small amount of thermal noise,
      Physical Review A, vol.55, no.4, pp.322-3225, 1997.

    9. M.Sasaki and O.Hirota,

    10. Quantum interference control for optimum decision between binary quantum state signals,
      Physics Letters A, vol.224, pp.213-219, 1997.
       
       
    11. M.Ban, K.Yamazaki, and O.Hirota,

    12. Accessible information in combined and sequential quantum measurement on a binary state signal,
      Physical Review A, vol.55, no.1, pp.22-26, 1997.
    1996

    1. M.Sasaki, T.Usuda, O.Hirota, and A.S.Holevo,

    2. Application of Jaynes-Cummings model for detection of non-orthogonal quantum states,
      Physical Review A, vol.53, no.3, pp.1273-1279, 1996.

    3. M.Sasaki and O.Hirota,

    4. Some examples of optimum decision for non-orthogonal quantum states,
      Physics Letters A, vol.210, pp.21-25, 1996.

    5. O.Hirota, M.Osaki, M.Sasaki, and M.Ban,

    6. Jaynes-Cummings model as quantum channel and quantum interference effect,
      The Review of Laser Engineering, vol.24, no.2, pp.261-269, 1996.

    7. M.Sasaki and O.Hirota,

    8. An optimum decision scheme with unitary control process for binary quantum state signals,
      Physical Review A, vol.54, no.4, pp.2728-2736, 1996.

    9. M.Osaki, M.Ban, and O.Hirota,

    10. Derivation of the optimum detection operator and its physical interpretation for coherent state signals,
      Physical Review A, vol.54, no.2, pp.1691-1701, 1996.

    11. M.Ban, M.Osaki, and O.Hirota,

    12. Upper bound of the accessible information and lower bound of th Bayes cost in quantum signal detection processes,
      Physical Review A, vol.54, no.4, pp.2718-2727, 1996.

    13. M.Ban, M.Osaki, and O.Hirota,

    14. Optimizations of quantum measurement processes for signal detection and information transmission in quantum systems,
      Journal of Modern Optics, vol.43, no.11, pp.2337-2354, 1996.
    1995
    1. V.P.Belavkin, O.Hirota, and R.Hudson,

    2. The world of quantum noise and fundamental output processes,
      Quantum communication and measurement,
      Plenum press, edited by Belavkin, Hirota, and Hudson, 1995.

    3. M.Sasaki, T.S.Usuda, and O.Hirota,

    4. Physical aspect of improvement of quantum noise characteristics caused by unitary transform with a non-linear optical medium,
      Physical Review A, vol.51, pp.1702-1705, 1995.

    5. O.Hirota,

    6. Role of Sch&oumldinger cat state in quantum information,
      Annals of the New York academy of science, vol.755, pp.863, 1995.

    7. T.S.Usuda, and O.Hirota,

    8. An example of received quantum state control,
      Quantum communication and measurement,
      Plenum press, edited by Belavkin, Hirota, and Hudson, 1995.

    9. R.Momose, M.Osaki, M.Ban, M.Sasaki, and O.Hirota,

    10. On a relation between quantum interference and standard quantum limit,
      In Proc. of 4th International conf. on squeezed state & uncertainty relation, NASA Proc. Series, 1995.

    11. M.Osaki, H.Kozuka, and O.Hirota,

    12. Physical meaning of optimum measurement process in quantum detection theory,
      In Proc. of 4th International conf. on squeezed state & uncertainty relation, NASA Proc. Series, 1995.

    13. O.Hirota,

    14. Non-causality and quantum communication theory,
      Research Review, Research Institute of Tamagawa University, no.1, pp.1, 1995.
    -1994
    1. T.S.Usuda, T.Satoh, K.Yamazaki, and O.Hirota,

    2. Signal to noise ratio of optical system consisting of squeezer and Kerr medium,
      Journal of Modern Optics, vol.41, pp.2275-2289, 1994.

    3. O.Hirota,

    4. Conditional quantum channel and certain of its construction,
      Journal of Open system & information dynamics, vol.2, pp.157-175. 1994.

    5. O.Hirota and Y.Suematsu,

    6. Quantum intensity noise of directly modulated lasers diode influenced by reflected waves,
      Transaction of IEICE Japan, vol.E-65, no.2, 1981.

    7. O.Hirota, Y.Suematsu, and K.Kwok,

    8. Enhancement effect of high frequency noise properties of injection lasers due to reflected waves,
      Optics Communications, vol.33, no.2, pp.136, 1980.

    9. O.Hirota, Y.Suematsu, and K.Kwok,

    10. Properties of intensity noise of laser diode due to reflected waves from single mode fiber and its reduction,
      IEEE Journal of Quantum Electronics, vol.QE-17, no.6, pp.1014, 1980.

    11. O.Hirota and Y.Suematsu,

    12. Noise properties of injection lasers due to reflected waves,
      IEEE Journal of Quantum Electronics, vol.QE-15, no.3, pp.142, 1979.

    B OOKS

    Books

    1. O.Hirota, A.S.Holevo, and C.M.Caves,

    2. Quantum communication, computing, and measurement, Plenum Press, 1997.

    3. V.P.Belavkin, O.Hirota, and R.L.Hudson,

    4. Quantum communication and measurement, Plenum Press, 1996.

    5. Squeezed light, Elsevier, 1992.
    6. C.Bendjaballah, O.Hirota, and S.Reynaud,

    7. Quantum aspect of optical communications, Lecture Note in Physics, Springer, LNP-378, 1991.

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