Realization and application of single photons in a single spatio-temporal mode by group velocity engineering

2010 Fiscal Year Final Research Report

• Project/Area Number: 20244062
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Atomic/Molecular/Quantum electronics
• Research Institution: Hokkaido University
• Principal Investigator: TAKEUCHI Shigeki Hokkaido University, 電子科学研究所, 教授 (80321959)
• Co-Investigator(Kenkyū-buntansha): KURIMURA Sunao 独立行政法人物質・材料研究機構, 光科学センター, 主任研究員 (10287964)
• Co-Investigator(Renkei-kenkyūsha): OKAMOTO Ryo 北海道大学, 電子科学研究所, 助教 (10435951)
• Project Period (FY): 2008 – 2010
• Keywords: 量子情報 / 単一光子

Research Abstract

The aim of this project was to realize single photon sources with spatio-temporal coherence and its application to optical quantum circuits. As a result, we succeed in the realization of a single photon source with two photon interference visibility of 95.8%. We also succeeded in the realization of 'an entanglement filter' which extracts certain polarization correlations between the two-photon inputs, and 'controlled-NOT optical quantum circuit' which was proposed by Knill et. al. in 2001 and the first step towards the scalable linear optics quantum computation. We also developed quasi phase matching devices for the control of group velocity dispersion and evaluated them.

Research Products

• [Journal Article] Realization of a photonic quantum circuit combining effective optical nonlinearities into a Knill-Laflamme-Milburn C-NOT gate (2011)
  • Author(s): R. Okamoto, J.L. O'Brien, H.F. Hofmann, S. Takeuchi
  • Journal Title: Proceedings of the National Academy of Sciences (in press)
  • Peer Reviewed
• [Journal Article] 分極反転による波長変換デバイス (2010)
  • Author(s): 栗村直
  • Journal Title: 光アライアンス 21(6) Pages: 6-9
  • Peer Reviewed
• [Journal Article] Analysis of experimental error sources in a linear-optics quantum gate (2010)
  • Author(s): T. Nagata, R. Okamoto, H.F. Hofmann, S. Takeuchi
  • Journal Title: New Journal of Physics vol.12 Pages: 43053-1-43053-17
  • Peer Reviewed
• [Journal Article] An Entanglement Filter (2009)
  • Author(s): R. Okamoto, J.L. O'Brien, H.F. Hofmann, T. Nagata, K. Sasaki, S. Takeuchi
  • Journal Title: Science International vol.323 Pages: 483-485
  • Peer Reviewed
• [Journal Article] Observing Quantum Correlation of Photons in Laguerre-Gauss Modes Using the Gouy Phase (2008)
  • Author(s): D. Kawase, Y. Miyamoto, M. Takeda, K. Sasaki, S. Takeuchi
  • Journal Title: Physical Review Letters vol.101 Pages: 050501-1-050501-4
  • Peer Reviewed
• [Presentation] Optical quantum circuit combining tailored optical nonlinearities (2011)
  • Author(s): S.Takeuchi, R. Okamoto, M. Fujiwara, H.Q. Zhao, H. Takashima, A. Tanaka, H.F. Hofmann, J.L. O'Brien
  • Organizer: SPIE Photonics west 2011, The Moscone Center
  • Place of Presentation: (Invited)
  • Year and Date: 2011-01-26
• [Presentation] 光子を操る-光量子回路の実現とその未来 (2010)
  • Author(s): 竹内繁樹
  • Organizer: 第71回応用物理学会学術講演会特別シンポジウム「レーザー50周年」
  • Place of Presentation: 長崎大学文教キャンパス
  • Year and Date: 2010-09-15
• [Presentation] Photonic quantum circuits and its application (2010)
  • Author(s): 竹内繁樹
  • Organizer: Quantum2010 5th Workshop ad memoriam of Carlo Novero Advances in Foundations of Quantum Mechanics and Quantum Information with atoms and photons/3rd Italian Quantum information Science Conference IQIS 2010
  • Place of Presentation: I.N.RI.M. Conference Hall (formerly IEN Galileo Ferraris)(Invited)
  • Year and Date: 2010-05-24
• [Presentation] 多極展開する分極反転非線形光学 (2010)
  • Author(s): 栗村直
  • Organizer: 日本学術会議公開シンポジウム「先端フォトニクスの展望」
  • Place of Presentation: はーといん乃木坂, 東京都,日本
  • Year and Date: 2010-04-09
• [Presentation] Realization of optical quantum circuits-an entanglement filter- (2009)
  • Author(s): 栗村直
  • Organizer: 8th INTERNATIONAL LASER PHYSICS WORKSHOP(LPHYS'09)
  • Place of Presentation: World Trade Center Barcelona(Invited)
  • Year and Date: 2009-07-13
• [Book] 第2編応用編 第1節 量子情報通信・処理の実現に向けた高効率固体量子位相ゲート (2010)
  • Author(s): 竹内繁樹
  • Total Pages: 440
  • Publisher: エヌ・ティー・エス
• [Book] I-1-6 光量子回路の現状と展望 (2010)
  • Author(s): 竹内繁樹
  • Total Pages: 272(14)
  • Publisher: 強光子場科学研究懇談会 発行
• [Book] 線形光学素子を用いた量子計算 -そのしくみと最新状況- (2009)
  • Author(s): 竹内繁樹
  • Total Pages: 528(386-397)
  • Publisher: オプトロニクス社
• [Remarks] 竹内繁樹、大和エイドリアン賞、(2010.12)
• [Remarks] 岡本亮、第4回日本物理学会若手奨励賞、(2010)
• [Remarks] 竹内繁樹、第6回日本学術振興会賞、(2010.3)
• [Remarks] ホームページ等
  • URL: www.sanken.osaka-u.ac.jp/labs/qip/index.html
• [Patent(Industrial Property Rights)] テーパ光ファイバ (2010)
  • Inventor(s): 竹内繁樹
  • Industrial Property Rights Holder: 国立大学法人北海道大学
  • Industrial Property Number: 特許,特願2010-015814
  • Filing Date: 2010-01-27
• [Patent(Industrial Property Rights)] テーパ光ファイバ (2009)
  • Inventor(s): 竹内繁樹
  • Industrial Property Rights Holder: 国立大学法人北海道大学
  • Industrial Property Number: 特許,特願2009-28429
  • Filing Date: 2009-02-10