Generation, control, and detection of mesoscopic quantum superposition states.

2008 Fiscal Year Final Research Report

• Project/Area Number: 19340115
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-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 Institution: National Institute of Information and Communications Technology
• Principal Investigator: SASAKI Masahide National Institute of Information and Communications Technology, 新世代ネットワーク研究センター・量子ICTグループ, グループリーダー (50359064)
• Project Period (FY): 2007 – 2008
• Keywords: 量子情報 / スクイーズド光

Research Abstract

連続波スクイーズド状態から任意の時間t1, t2において光子を一個ずつ抜き取る操作を実現し、偶・奇の両パリティのシュレーディンガーの猫状態を自在に生成する技術を開発した。特に、100ns程度のコヒーレンス時間内で時間間隔t2t1を変化させることにより、シュレーディンガーの猫状態の振幅サイズを増強できることを見出し、その機構が2つの異なる時間波形モードからの識別不可能な2光子抜き取り過程が量子的に干渉に起因すること解明した。

Research Products

• [Journal Article] Large-amplitude coherent-state superposition generated by a time-separated two-photon subtraction from a continuous-wave squeezed vacuum (2008)
  • Author(s): M. Takeoka, H. Takahashi, and M. Sasaki
  • Journal Title: Phys. Rev. A77 Pages: 062315/1-9
  • Peer Reviewed
• [Journal Article] Temporally multiplexed superposition states of continuous variables (2008)
  • Author(s): M. Sasaki, M. Takeoka, and H. Takahashi
  • Journal Title: Physical Review A77 Pages: 0063840/1-11
  • Peer Reviewed
• [Journal Article] Generation of large-amplitude coherent-state superposition via ancilla-assisted photon-subtraction (2008)
  • Author(s): H. Takahashi, K. Wakui, S. Suzuki, M. Takeoka, K. Hayasaka, A. Furusawa, and M. Sasaki
  • Journal Title: Phys. Rev. Lett. 101 Pages: 233605/1-4
  • Peer Reviewed
• [Journal Article] 非ガウス型量子状態の生成について (2008)
  • Author(s): 和久井健太郎
  • Journal Title: レーザー学会「レーザー研究」 36(7) Pages: 41-420
  • Peer Reviewed
• [Journal Article] 高レベル・高純粋度のスクイーズド光生成について (2008)
  • Author(s): 鈴木重成
  • Journal Title: レーザー学会「レーザー研究」 36(7) Pages: 39-403
  • Peer Reviewed
• [Journal Article] 連続量変数の光量子計算と量子情報通信 (2008)
  • Author(s): 武岡 正裕
  • Journal Title: 光学 37(12) Pages: 692-697
  • Peer Reviewed
• [Journal Article] 非ガウス型量子操作によるシュレーディンガーの子猫状態の生成 (2008)
  • Author(s): 和久井 健太郎
  • Journal Title: 光学 37(12) Pages: 712/715
  • Peer Reviewed
• [Journal Article] Control of optical continuous variable systems using photon counting and feedforward (2007)
  • Author(s): M. Sasaki
  • Journal Title: Proc. of The 8th International Conference on Quantum Communication, Measurement and Computing(QCMC2006) 1 Pages: 469-474
  • Peer Reviewed
• [Journal Article] Conditional generation of an arbitrary superposition of coherent states (2007)
  • Author(s): M. Takeoka, and M. Sasaki
  • Journal Title: Phys. Rev. A75(2) Pages: 064302/1-4
  • Peer Reviewed
• [Presentation] Ancilla-assisted control of quantum superposition states of continuous variables (2009)
  • Author(s): M. Sasaki
  • Organizer: SPIE Photonics West, OPTO 2009
  • Place of Presentation: San JoseConvention Center, San Jose, USA
  • Year and Date: 2009-01-28
• [Presentation] Quantum superposition states of continuous variables (2009)
  • Author(s): M. Sasaki
  • Organizer: UK-Japan Workshop : Quantum Application
  • Place of Presentation: the British Embassy in Japan, Tokyo, Japan,
  • Year and Date: 2009-01-22
• [Presentation] Generation of optical Schroedinger cat-like states and classical-quantum channel coding (2008)
  • Author(s): M. Takeoka
  • Organizer: Workshop on topological cluster state computing in optics
  • Place of Presentation: The National Institute of Informatics (NII), Tokyo, Japan
  • Year and Date: 2008-12-11
• [Presentation] Generation of large-amplitude coherent-state superposition via ancilla-assisted photon-subtraction (2008)
  • Author(s): H. Takahashi
  • Organizer: 2008 International Symposium on Physics of Quantum Technology
  • Place of Presentation: Nara Prefectural New Public Hall, Nara, Japan
  • Year and Date: 2008-11-25
• [Presentation] 量子情報通信の概要 (2008)
  • Author(s): 佐々木雅英
  • Organizer: 第75回テレコム技術情報セミナー
  • Place of Presentation: コクヨホール, 東京
  • Year and Date: 2008-10-24
• [Presentation] 連続量量子情報 (2008)
  • Author(s): 佐々木雅英
  • Organizer: 第四回量子情報未来テーマ開拓研究会
  • Place of Presentation: ホテルサンライズ知念, 南城市, 沖縄
  • Year and Date: 2008-09-11
• [Presentation] Temporally multiplexed Shroedinger kitten states (2008)
  • Author(s): M. Sasaki
  • Organizer: The Ninth International Conference on Quantum Communication, Measurement and Computing (QCMC2008)
  • Place of Presentation: The University of Calgary, Canada
  • Year and Date: 2008-08-21
• [Presentation] Control of Superposition States of Continuous Variables by Photon Counting and Filtering with cw Squeezed Light (2008)
  • Author(s): M. Sasaki
  • Organizer: 3rd International Conference on Quantum Information (ICQI)
  • Place of Presentation: Boston Marriott Copley Place, Boston, Massachusetts, USA
  • Year and Date: 2008-07-14
• [Presentation] Generation and control of flying Schroedinger kitten states (2008)
  • Author(s): M. Sasaki
  • Organizer: The Fourth Asia Pacific Conference in Quantum Information Science (APCQIS)
  • Place of Presentation: Cairns, Queensland, Australia
  • Year and Date: 2008-07-04
• [Presentation] Demonstration of 2-photon subtraction from a squeezed vacuum (2007)
  • Author(s): H. Takahashi
  • Organizer: SPIE Optics East
  • Place of Presentation: Seaport World Trade Center, Boston, Massachusetts, USA
  • Year and Date: 2007-09-12
• [Presentation] Non-Gaussian control of continuous variables with photon counting and filtering (2007)
  • Author(s): M. Sasaki
  • Organizer: SPIE Optics East, Proc. of SPIE Optics East, pp 678006/1-8
  • Place of Presentation: Seaport World Trade Center, Boston, Massachusetts, USA
  • Year and Date: 2007-09-10