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2010 Fiscal Year Final Research Report

Quantum information processing based on complementarity in quantum mechanics

Research Project

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Project/Area Number 20540389
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Atomic/Molecular/Quantum electronics
Research InstitutionOsaka University

Principal Investigator

KOASHI Masato  Osaka University, 大学院・基礎工学研究科, 准教授 (90322099)

Project Period (FY) 2008 – 2010
Keywords相補性 / 量子暗号 / 量子鍵配送 / 量子もつれ
Research Abstract

Theory on the security of quantum key distribution (QKD) protocols based on complementarity in quantum mechanics has been developed. This method is applicable to any QKD protocols in principle. Security proofs were provided for several QKD protocols with practical devices. Quantitative relations among various properties of quantum origin (quantum entanglement, private communication, and complementarity) were revealed through derivation of universal equations connecting the measures of quantum correlation defined operationally in terms of those properties.

  • Research Products

    (24 results)

All 2011 2010 2009 2008

All Journal Article (12 results) (of which Peer Reviewed: 12 results) Presentation (11 results) Book (1 results)

  • [Journal Article] Efficient Decoherence-Free Entanglement Distribution over Lossy Quantum Channels2011

    • Author(s)
      R.Ikuta, Y.Ono, T.Tashima, T.Yamamoto, M.Koashi, N.
    • Journal Title

      Physical Review Letters Vol.106

      Pages: 110503:1-4

    • Peer Reviewed
  • [Journal Article] Optimal local expansion of W states using linear optics and Fock states2010

    • Author(s)
      R.Ikuta, T.Tashima, T.Yamamoto, M.Koashi, N.Imoto
    • Journal Title

      Physical Review A Vol.83

      Pages: 012314:1-8

    • Peer Reviewed
  • [Journal Article] Demonstration of Local Expansion Toward Large-Scale Entangled Webs2010

    • Author(s)
      T.Tashima, T.Kitano, S.K.Ozdemir, M.Koashi, N.Imoto
    • Journal Title

      Physical Review Letters Vol.105

      Pages: 210503:1-4

    • Peer Reviewed
  • [Journal Article] Tight bound on coherent-state-based entanglement generation over lossy channels2010

    • Author(s)
      K.Azuma, N.Sota, M.Koashi, N.Imoto
    • Journal Title

      Physical Review A Vol.81

      Pages: 022325:1-6

    • Peer Reviewed
  • [Journal Article] Optimal entanglement generation for efficient hybrid quantum repeaters2009

    • Author(s)
      K.Azuma, N.Sota, R.Namiki, S.K.Ozdemir, T.Yamamoto, M.Koashi, N.Imoto
    • Journal Title

      Physical Review A Vol.80

      Pages: 060303(R):1-4

    • Peer Reviewed
  • [Journal Article] Boosting up quantum key distribution by learning statistics of practical single-photon sources2009

    • Author(s)
      Y.Adachi, T.Yamamoto, M.Koashi, N.Imoto
    • Journal Title

      New Journal of Physics Vol.11

      Pages: 113033:1-10

    • Peer Reviewed
  • [Journal Article] Unconditional security of the Bennett 1992 quantum-key-distribution scheme with a strong reference pulse2009

    • Author(s)
      K.Tamaki, N.Lutkenhaus, M.Koashi, J.Batuwantudawe
    • Journal Title

      Physical Review A Vol.80

      Pages: 032302:1-9

    • Peer Reviewed
  • [Journal Article] Simple security proof of quantum key distribution based on complementarity2009

    • Author(s)
      M.Koashi
    • Journal Title

      New Journal of Physics Vol.11

      Pages: 045018:1-12

    • Peer Reviewed
  • [Journal Article] Local transformation of two Einstein-Podolsky-Rosen photon pairs into a three-photon W state2009

    • Author(s)
      T.Tashima, T.Wakatsuki, S.K.Ozdemir, T.Yamamoto, M.Koashi, N.Imoto
    • Journal Title

      Physical Review Letters Vol.102

      Pages: 130502:1-4

    • Peer Reviewed
  • [Journal Article] Compact Toffoli gate using weighted graph states2009

    • Author(s)
      M.S.Tame, S.K.Ozdemir, M.Koashi, N.Imoto, M.S.Kim
    • Journal Title

      Physical Review A Vol.79

      Pages: 020302(R):1-4

    • Peer Reviewed
  • [Journal Article] Local expansion of photonic W state using a polarization dependent beamsplitter2009

    • Author(s)
      T.Tashima, S.K.Ozdemir, T.Yamamoto, M.Koashi, N.Imoto
    • Journal Title

      New Journal of Physics Vol.11

      Pages: 023024:1-10

    • Peer Reviewed
  • [Journal Article] Robust photonic entanglement distribution by state-independent encoding onto decoherence-free subspace2008

    • Author(s)
      T.Yamamoto, K.Hayashi, S.K.Ozdemir, M.Koashi, N.Imoto
    • Journal Title

      Nature Photonics Vol.2

      Pages: 488-491

    • Peer Reviewed
  • [Presentation] Complementarity approach to security of quantum key distribution with practical devices2010

    • Author(s)
      Masato Koashi
    • Organizer
      Updating Quantum Cryptography and Communications (UQCC2010)(招待講演)
    • Place of Presentation
      ANA InterContinental Hotel, Tokyo, Japan.
    • Year and Date
      2010-10-19
  • [Presentation] Security of quantum key distribution with practical devices, International Conference on Core Research and Engineering Science of Advanced Materials (Global COE Program)2010

    • Author(s)
      Masato Koashi
    • Organizer
      Third International Conference on Nanospintronics Design and Realization (3rd-ICNDR) (招待講演)
    • Place of Presentation
      Convention Center, Osaka University, Osaka, Japan.
    • Year and Date
      2010-05-30
  • [Presentation] Understanding security of quantum key distribution via complementarity2010

    • Author(s)
      Masato Koashi
    • Organizer
      2010 International Symposium on Physics of Quantum Technology (2010 ISPQT) (招待講演)
    • Place of Presentation
      Hitotsubashi memorial hall, Tokyo, Japan.
    • Year and Date
      2010-04-09
  • [Presentation] Security of key distribution and complementarity in quantum mechanics2009

    • Author(s)
      Masato Koashi
    • Organizer
      The 4th International Conference on Information Theoretic Security (ICITS2009) (招待講演)
    • Place of Presentation
      Granship, Shizuoka, Japan.
    • Year and Date
      2009-12-04
  • [Presentation] Complementarity and security of quantum key distribution2009

    • Author(s)
      Masato Koashi
    • Organizer
      The 3rd Conference on Quantum Information and Quantum Control (CQIQCIII) (招待講演)
    • Place of Presentation
      Fields Institute, Toronto, Canada.
    • Year and Date
      2009-08-27
  • [Presentation] Quantitative relations among different aspects of quantum correlations2009

    • Author(s)
      Masato Koashi
    • Organizer
      The 4th Workshop on Theory of Quantum Computation, Communication, and Cryptography (TQC 2009) (招待講演)
    • Place of Presentation
      University of Waterloo, Canada.
    • Year and Date
      2009-05-13
  • [Presentation] 相補性及びエンタングルメントと量子暗号2009

    • Author(s)
      小芦雅斗
    • Organizer
      日本物理学会第64回年次大会29pTB-5(シンポジウム講演)
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-29
  • [Presentation] Quantum nonlocality without entanglement in a pair of qubits2009

    • Author(s)
      Masato Koashi
    • Organizer
      DEX-SMI Workshop on Quantum Statistical Inference(招待講演)
    • Place of Presentation
      National Institute of Informatics (NII), Tokyo, Japan.
    • Year and Date
      2009-03-02
  • [Presentation] Entanglement, monogamy, and complementarity2009

    • Author(s)
      Masato Koashi
    • Organizer
      UK-Japan Quantum Information Workshop(招待講演)
    • Place of Presentation
      British Embassy Tokyo, Japan.
    • Year and Date
      2009-01-22
  • [Presentation] On the irreversiblity of measurements of correlations2008

    • Author(s)
      Masato Koashi
    • Organizer
      International Workshop on Statistical-Mechanical Informatics 2008(招待講演)
    • Place of Presentation
      Sendai International Center, Japan.
    • Year and Date
      2008-09-14
  • [Presentation] 量子暗号に現れる量子力学の諸性質2008

    • Author(s)
      小芦雅斗
    • Organizer
      科学基礎論学会2008年度講演会シンポジウム(招待講演)
    • Place of Presentation
      東京電機大学
    • Year and Date
      2008-06-21
  • [Book] SGCライブラリ67:量子暗号理論の展開2008

    • Author(s)
      小芦雅斗、小柴健史
    • Total Pages
      1-78
    • Publisher
      サイエンス社

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Published: 2012-01-26   Modified: 2016-04-21  

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