High fidelity entanglement swapping at telecommunication wavelength using single-photon detectors based on compound semiconductors

• Project/Area Number: 23760053
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Applied optics/Quantum optical engineering
• Research Institution: Nihon University
• Principal Investigator: NAMEKATA Naoto 日本大学, 理工学部, 助教 (20453912)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2011: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
• Keywords: 量子もつれ交換 / 単一光子検出 / 通信波長帯

Research Abstract

Entanglement swapping experiment was carried out using spatially separated, polarization entangled photon sources at 1550 nm. In this experiment, we employed sinusoidally gated InGaAs/InP avalanche photodiodes which achieve high repetition frequencies and low dark counts. The high-performance single-photon detectors enable us to obtain ~ 0.9 of a fidelity of the entanglement swapping. The high-fidelity entanglement swapping will be able to be applied to the quantum key distribution over an optical fiber network.

Research Products

• [Journal Article] Sinusoidally gated InGaAs Avalanche Photodiode with Direct Hold-Off Function for Efficient and Low-Noise Single-Photon Detection," to be published in Appl. (2013)
  • Author(s): Q. L. Wu, N. Namekata and S. Inoue
  • Journal Title: Phys. Express
  • Peer Reviewed
• [Presentation] Quantum interference Between Separated Photon Pairs at Telecommunication Wavelength (2013)
  • Author(s): Qing-Lin Wu、行 方 直 人 、井上修一郎
  • Organizer: 第60回応用物理学関係連合講演会
  • Place of Presentation: 厚木
  • Year and Date: 2013-03-30
• [Presentation] 分極反転デバイスを用いた量子鍵配送へ向けた量子もつれ配送と交換 (2013)
  • Author(s): 行方直人、呉青林、栗村直井上修一郎
  • Organizer: 第60回応用物理学関係連合講演会
  • Place of Presentation: 厚木
  • Year and Date: 2013-03-28
• [Presentation] Quantum interference Between Separated Photon Pairs at Telecommunication Wavelength (2013)
  • Author(s): Qing-Lin Wu、行方直人、井上修一郎
  • Organizer: 応用物理学会春季講演会
  • Place of Presentation: 神奈川工科大学
• [Presentation] 分極反転デバイスを用いた量子鍵配送へ向けた量子もつれ配送と交換 (2013)
  • Author(s): 行方直人、Qing-Lin Wu、栗村直、井上修一郎
  • Organizer: 応用物理学会春季講演会
  • Place of Presentation: 神奈川工科大学
  • Invited
• [Presentation] 正弦電圧ゲート印加InGaAs/InP APDの非同期動の非同期動の非同期動作 (2012)
  • Author(s): 行方直人 呉青林, 井上修一郎
  • Organizer: 応用物理学会術講演会,
• [Presentation] Recent progress of near-infrared single-photon detector based onInGaAs/InP avalanche photodiode and its application to quantum technology (2012)
  • Author(s): N. Namekata
  • Organizer: The International Conference on Quantum Foundation and Technology
  • Place of Presentation: Dunhuang, China
• [Presentation] Free-Running Single-Photon Detection at Telecommunication Wavelength Using a Sinusoidally Gated InGaAs/InP Avalanche Photodiode (2012)
  • Author(s): N. Namekata, Q. L. Wu, and S. Inoue
  • Organizer: The International Conference on Quantum Foundation and Technology
  • Place of Presentation: Dunhuang,China
• [Presentation] Hong-Ou-Mandel interference with photon pairs at 1550nm created in spatially separated sources (2012)
  • Author(s): Q. L. Wu, N. Namekata, and S. Inoue
  • Organizer: The International Conference on Quantum Foundation and Technology
  • Place of Presentation: Dunhuang,China
• [Presentation] Recent progress of near-infrared single-photon detector based on InGaAs/InP avalanche photodiode and its application to quantum technology (2012)
  • Author(s): N. Namekata
  • Organizer: The International Conference on Quantum Foundation and Technology
  • Place of Presentation: 敦煌、中国
  • Invited
• [Presentation] Free-Running Single-Photon Detection at Telecommunication Wavelength Using a Sinusoidally Gated InGaAs/InP Avalanche Photodiode (2012)
  • Author(s): N. Namekata, Q. L. Wu, and S. Inoue
  • Organizer: The International Conference on Quantum Foundation and Technology
  • Place of Presentation: 敦煌、中国
• [Presentation] Hong-Ou-Mandel interference with photon pairs at 1550nm created in spatially separated sources (2012)
  • Author(s): Q. L. Wu, N. Namekata, and S. Inoue
  • Organizer: The International Conference on Quantum Foundation and Technology
  • Place of Presentation: 敦煌、中国
• [Presentation] 正弦電圧ゲート印加InGaAs/InP APDの非同期動作 (2012)
  • Author(s): 行方直人, 呉青林, 井上修一郎
  • Organizer: 応用物理学会学術講演会
  • Place of Presentation: 愛媛大学
• [Presentation] 高レート偏光量子もつれ光子対発生と偶発的計数の評価 (2011)
  • Author(s): 行方直人、河野太一、栗村直、井上修一郎
  • Organizer: 第72回応用物理学会学術講演会
  • Place of Presentation: 山形大学
• [Presentation] High-Efficiency Single-photon detection using Sinusoidally Gated InGaAs/InP Avalanche Photodiode (2011)
  • Author(s): Q. L. Wu, N. Namekata, T. Kono, and S. Inoue
  • Organizer: the annual international laser physics workshop 2011
  • Place of Presentation: Sarajevo,Bosnia and Herzegovina
• [Presentation] High-Efficiency Single-photon detection using Sinusoidally Gated InGaAs/InP Avalanche Photodiode
  • Author(s): Q. L. Wu, N. Namekata, T. Kono, and S. Inoue
  • Organizer: the annual international laser physics workshop 2011
  • Place of Presentation: Sarajevo, Bosnia and Herzegovina