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Analysis and optimization of optical quantum information systems

Research Project

Project/Area Number 18540393
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 原子・分子・量子エレクトロニクス・プラズマ
Research InstitutionHiroshima University

Principal Investigator

HOFMANN Holger F.  Hiroshima University, 大学院・先端物質科学研究科, 准教授 (90379909)

Project Period (FY) 2006 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥4,060,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥660,000)
Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2007: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2006: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywords量子情報 / 量子プロセス / 密度行列 / 多光子干渉 / 光学量子回路 / エンタングルメント状態 / 量子測定 / 位相感度 / 多光子状態 / エンタングルメントの状態 / 位相スクイージグ / 量子クローニング / 電場と光子の相関 / ナノアンテナ / 量子プロセスフィデリティ / エンタングルメントの性能 / 位相スクイージング
Research Abstract

本研究では, 量子情報処理での量子統計特性を探索し, 実験的に避けられない不備の状況下で, いかに強い非古典的な効果が観測できるかを示した. この結果は2光子偏光エンタングルメントフィルターの初の実証実験で実験的な指標を表すために使用された. さらに, 情報の担体として光の空間自由度の利用や, 位相感度の高い状態を発生する新しい方法, 及び単一光子キュービットの突発的なクローニングの実現方法を提案した.

Report

(4 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (35 results)

All 2009 2008 2007 2006

All Journal Article (24 results) (of which Peer Reviewed: 20 results) Presentation (11 results)

  • [Journal Article] All path-symmetric pure states achieve their maximal phase sensitivity in conventional two-path interferometry2009

    • Author(s)
      H.F. Hofmann
    • Journal Title

      Physical Review A 79

      Pages: 33822-33822

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] An entanglement filter2009

    • Author(s)
      R. Okamoto, J.L. O`Brien, H.F. Hofmann, T. Nagata, K. Sasaki, and S. Takeuchi
    • Journal Title

      Science 323

      Pages: 483-485

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] An entanglement filter2009

    • Author(s)
      Ryo Okamoto
    • Journal Title

      Science 323

      Pages: 483-485

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] All path-symmetric pure states achieve their maximal phase sensitivity in conventional two-path interferometry2009

    • Author(s)
      Holger F. Hofmann
    • Journal Title

      Physical Review A 79

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Beating the standard quantum limit : phase super-sensitivity of N-photon interferometers2008

    • Author(s)
      R. Okamoto, H.F. Hofmann, T. Nagata, J.L. O`Brien, K. Sasaki, and S. Takeuchi
    • Journal Title

      New Journal of Physics 10

      Pages: 73033-73033

    • NAID

      120004448544

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Measurement and control of spatial qubits generated by passing photons through double-slits2008

    • Author(s)
      G. Taguchi, T. Dougakiuchi, N. Yoshimoto, K. Kasai, M. Iinuma, H. F. Hofmann, and Y. Kadoya
    • Journal Title

      Physical Review A 78

      Pages: 12307-12307

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Quantum enhancement of N-photon phase sensitivity by interferometric addition of down-converted photon pairs to weak coherent light, Journal of Physics B : Atomic2008

    • Author(s)
      T. Ono and H. F. Hofmann
    • Journal Title

      Molecular and Optical Physics 41

      Pages: 95502-95502

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Quantum enhancement of N-photon phase sensitivity by interferometric addition of down-converted photon pairs to weak coherent light2008

    • Author(s)
      Takafumi Ono
    • Journal Title

      Journal of Physics B : At. Mol. Opt. Phys. 41

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Measurement and control of spatial qubits generated by passing photons through double-slits2008

    • Author(s)
      Gen Taguchi
    • Journal Title

      Physical Review A 78

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Beating the standard quantum limit : phase super-sensitivity of N-photon interferometers2008

    • Author(s)
      Ryo Okamoto
    • Journal Title

      New Journal of Physics 10

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High photon-number path entanglement in the interference of spontaneously down-converted photon pairs with coherent laser light2007

    • Author(s)
      H. F. Hofmann and T. Ono
    • Journal Title

      Physical Review A 76

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Design parameters for a nano-optical Yagi-Uda antenna2007

    • Author(s)
      H.F. Hofmann, T. Kosako, and Y. Kadoya
    • Journal Title

      New Journal of Physics 9

      Pages: 217-217

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Accidental cloning of a single-photon qubit in two-channel continuous-variable quantum teleportation2007

    • Author(s)
      T. Ide and H. F. Hofmann
    • Journal Title

      Physical Review A 75

      Pages: 62311-62311

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Accidental cloning of a single-photon qubit in two-channel continuous-variable quantum teleportation2007

    • Author(s)
      Toshiki Ide
    • Journal Title

      Physical Review A 75

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Design parameters for a nano-optical Yagi-Uda antenna2007

    • Author(s)
      Holger F. Hofmann
    • Journal Title

      New Journal of Physics 9

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High photon-number path entanglement in the interference of spontaneously down-converted photon pairs with coherent laser light2007

    • Author(s)
      Holger F. Hofmann
    • Journal Title

      Physical Review A 76

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Characterization of errors in quantum processes using finite sets of test measurements2006

    • Author(s)
      H. F. Hofmann
    • Journal Title

      Proceedings of SPIE 6305

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Analysis of an experimental quantum logic gate by complementary classical operations2006

    • Author(s)
      H.F. Hofmann, R. Okamoto, and S. Takeuchi
    • Journal Title

      Modern Physics Letters A 21

      Pages: 1837-1850

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Optimal cloning of single photon polarization by coherent feedback of beam splitter losses2006

    • Author(s)
      H. F. Hofmann and T. Ide
    • Journal Title

      New Journal of Physics 8

      Pages: 130-130

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Generation of a highly phase sensitive polarization squeezed N-photon state by collinear parametric downconversion and coherent photon subtraction2006

    • Author(s)
      H. F. Hofmann
    • Journal Title

      Physical Review A 74

      Pages: 13808-13808

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Generation of a highly-phase-sensitive polarization-squeezed N-Photon state by collinear down-conversion and coherent photon subtraction2006

    • Author(s)
      Holger F. Hofmann
    • Journal Title

      Physical Review A 74

      Pages: 13808-13808

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Optimal cloning of single-photon polarization by coherent feedback of beam splitter losses2006

    • Author(s)
      Holger F. Hofmann
    • Journal Title

      New Journal of Physics 8

      Pages: 130-130

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Analysis of an experimental quantum logic gate by complementary classical operations2006

    • Author(s)
      Holger F. Hofmann
    • Journal Title

      Modern Physics Letters A 21

      Pages: 1837-1837

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Characterization of errors in quantum processes using finite sets of test measurements2006

    • Author(s)
      Holger F. Hofmann
    • Journal Title

      Proceedings of SPIE 6305

    • Related Report
      2006 Annual Research Report
  • [Presentation] On the phase sensitivity of two path interferometry using path-symmetric N-photon states2008

    • Author(s)
      Holger F. Hofmann
    • Organizer
      ISQM 2008
    • Place of Presentation
      Hitachi Advanced Research Laboratories, Hatoyama
    • Year and Date
      2008-08-25
    • Related Report
      2008 Annual Research Report 2008 Final Research Report
  • [Presentation] Experimental evaluation of a quantum filter : truth tables and process matrix estimates2008

    • Author(s)
      Holger F. Hofmann
    • Organizer
      Quantum Information and Control in Queensland
    • Place of Presentation
      Palm Cove Resort Convention Center, Cairns, Australia
    • Year and Date
      2008-06-30
    • Related Report
      2008 Final Research Report
  • [Presentation] Experimental evaluation of a quantum filter : truth tables and process matrix estimates2008

    • Author(s)
      Holger F. Hofmann
    • Organizer
      Quantum Information and Control in Queensland
    • Place of Presentation
      Palm Cove Resort Convention Center, Cairns, Aust ralia
    • Year and Date
      2008-06-30
    • Related Report
      2008 Annual Research Report
  • [Presentation] Evaluation ofquantum effects from measurement data2008

    • Author(s)
      Holger F. Hofmann
    • Organizer
      KEK研究会量子論の諸問題と今後の発展
    • Place of Presentation
      KEKつくば
    • Year and Date
      2008-03-20
    • Related Report
      2008 Final Research Report
  • [Presentation] Evaluation of quantum effects from measurement data2008

    • Author(s)
      Holger F. Hofmann
    • Organizer
      KEK研究会 量子論の諸問題と今後の発展
    • Place of Presentation
      KEK つくば
    • Year and Date
      2008-03-20
    • Related Report
      2007 Annual Research Report
  • [Presentation] Interference between coherent light and down-converted photons2007

    • Author(s)
      Holger F. Hofmann
    • Organizer
      a tunable source of multi-photon coherence, Photons, Atoms, and Qubits 2007
    • Place of Presentation
      Royal Society, London, United Kingdom
    • Year and Date
      2007-09-03
    • Related Report
      2008 Final Research Report
  • [Presentation] Interference between coherent light and down-converted photons: a tunable source of multi-photon coherence2007

    • Author(s)
      Holger F. Hofmann
    • Organizer
      Photons, Atoms, and Qubits 2007
    • Place of Presentation
      Royal Society, London, England
    • Year and Date
      2007-09-03
    • Related Report
      2007 Annual Research Report
  • [Presentation] Generation of N-photon phase squeezed states by interference of down-converted photon pairs with weak coherent light2007

    • Author(s)
      Holger F. Hofmann
    • Organizer
      CLEO pacific rim 2007
    • Place of Presentation
      COEX, Seoul, Korea
    • Year and Date
      2007-08-27
    • Related Report
      2008 Final Research Report 2007 Annual Research Report
  • [Presentation] At the quantum limit of classical interference2007

    • Author(s)
      Holger F. Hofmann
    • Organizer
      photon statistics of an extremely phase squeezed two-mode N-photon state, Quantum Information Processing 07
    • Place of Presentation
      Griffith University Conservatory, Brisbane, Australia
    • Year and Date
      2007-01-31
    • Related Report
      2008 Final Research Report
  • [Presentation] How to identify errors in quantum operations2006

    • Author(s)
      Holger F. Hofmann
    • Organizer
      QUPREST 2006
    • Place of Presentation
      Budmerice Chateaux, Budmerice, Slovakia
    • Year and Date
      2006-09-28
    • Related Report
      2008 Final Research Report
  • [Presentation] Characterization of errors in quantum processes using finite sets of test measurements2006

    • Author(s)
      Holger F. Hofmann
    • Organizer
      SPIE Optics and Photonics
    • Place of Presentation
      San Diego Convention Center, San Diego, USA
    • Year and Date
      2006-08-13
    • Related Report
      2008 Final Research Report

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Published: 2006-04-01   Modified: 2016-04-21  

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