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    • 1. 发明授权
    • Quantum key distribution system and method using regulated single-photon source
    • 量子密钥分配系统和方法采用调制单光子源
    • US07346166B2
    • 2008-03-18
    • US10712761
    • 2003-11-12
    • Kyo InoueEdo WaksYoshihisa Yamamoto
    • Kyo InoueEdo WaksYoshihisa Yamamoto
    • H04L9/00
    • H04L9/0858
    • A system and method for quantum key distribution uses a regulated single-photon source to sequentially generate a first photon and a second photon separated by a time interval Δt. The two photons are directed through a beam splitter that directs each photon to one of two transmission lines, which lead to two respective receivers. When one of the photons arrives at a receiver, it passes through an interferometer. One arm of the interferometer has a path length longer than the other arm by an amount equivalent to a photon time delay of Δt. The photon is then detected in one of three time slots by one of two single-photon detectors associated with each of the two interferometer outputs. Due to quantum-mechanical entanglement in phase and time between the two photons, the receivers can determine a secret quantum key bit value from their measurements of the time slots in which the photons arrived, or of the detectors where the photons arrived.
    • 用于量子密钥分配的系统和方法使用调节的单光子源来顺序地产生由时间间隔Deltat分离的第一光子和第二光子。 两个光子被引导通过分束器,其将每个光子引导到两个传输线中的一个,其导致两个相应的接收器。 当一个光子到达接收器时,它通过一个干涉仪。 干涉仪的一个臂具有比另一个臂长的路径长度等于Deltat的光子时间延迟的量。 然后通过与两个干涉仪输出中的每一个相关联的两个单光子检测器中的一个检测三个时隙之一中的光子。 由于两个光子之间的相位和时间的量子力学纠缠,接收器可以根据其光子到达的时隙或者光子到达的检测器的测量来确定秘密的量子密钥位值。
    • 2. 发明申请
    • Quantum key distribution system and method using regulated single-photon source
    • 量子密钥分配系统和方法采用调制单光子源
    • US20050094818A1
    • 2005-05-05
    • US10712761
    • 2003-11-12
    • Kyo InoueEdo WaksYoshihisa Yamamoto
    • Kyo InoueEdo WaksYoshihisa Yamamoto
    • H04L9/12H04L9/08H04L9/00
    • H04L9/0858
    • A system and method for quantum key distribution uses a regulated single-photon source to sequentially generate a first photon and a second photon separated by a time interval Δt. The two photons are directed through a beam splitter that directs each photon to one of two transmission lines, which lead to two respective receivers. When one of the photons arrives at a receiver, it passes through an interferometer. One arm of the interferometer has a path length longer than the other arm by an amount equivalent to a photon time delay of Δt. The photon is then detected in one of three time slots by one of two single-photon detectors associated with each of the two interferometer outputs. Due to quantum-mechanical entanglement in phase and time between the two photons, the receivers can determine a secret quantum key bit value from their measurements of the time slots in which the photons arrived, or of the detectors where the photons arrived.
    • 用于量子密钥分配的系统和方法使用调节的单光子源来顺序地产生由时间间隔Deltat分离的第一光子和第二光子。 两个光子被引导通过分束器,其将每个光子引导到两个传输线中的一个,其导致两个相应的接收器。 当一个光子到达接收器时,它通过一个干涉仪。 干涉仪的一个臂具有比另一个臂长的路径长度等于Deltat的光子时间延迟的量。 然后通过与两个干涉仪输出中的每一个相关联的两个单光子检测器中的一个检测三个时隙之一中的光子。 由于两个光子之间的相位和时间的量子力学纠缠,接收器可以根据其光子到达的时隙或者光子到达的检测器的测量来确定秘密量子密钥位值。