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    Quantum Coherent Systems and Operations
    1.
    发明申请
    Quantum Coherent Systems and Operations 失效
    量子相干系统和操作

    公开(公告)号：US20080310000A1

    公开(公告)日：2008-12-18

    申请号：US11658427

    申请日：2005-06-28

    申请人： Raymond G. Beausoleil, JR. ,  William J. Munro ,  Timothy P. Spiller ,  Sean D. Barrett ,  Pieter Kok ,  Kae Nemoto

    发明人： Raymond G. Beausoleil, JR. ,  William J. Munro ,  Timothy P. Spiller ,  Sean D. Barrett ,  Pieter Kok ,  Kae Nemoto

    IPC分类号： G02F3/00 ,  G02F1/01

    CPC分类号： G06N99/002 ,  B82Y10/00

    摘要： Nonlinear elements can efficiently implement quantum information processing systems such as controlled phase shifters, non-absorbing detectors including parity detectors, quantum subspace projections, non-absorbing Bell state analyzers, non-absorbing encoders/entanglers, and fundamental quantum gates such as CNOT gates. The non-absorbing detectors permit improvements in the efficiency of a probabilistic quantum gate by permitting reuse of the same photonic resources during multiple passes through the probabilistic gate.

    摘要翻译： 非线性元件可以有效地实现量子信息处理系统，例如受控移相器，非吸收检测器，包括奇偶检测器，量子子空间投影，非吸收贝尔状态分析器，非吸收编码器/纠缠器，以及诸如CNOT门的基本量子门。 非吸收检测器允许通过在多次通过概率门之间重复使用相同的光子资源来提高概率量子门的效率。

    Methods for determining relative phase differences in entangled quantum states
    2.
    发明授权
    Methods for determining relative phase differences in entangled quantum states 失效
    确定纠缠量子态相对相位差的方法

    公开(公告)号：US07426444B2

    公开(公告)日：2008-09-16

    申请号：US11407600

    申请日：2006-04-19

    申请人： Raymond G. Beausoleil ,  William J. Munro ,  Timothy P. Spiller ,  Pieter Kok ,  Sean D. Barrett ,  Kae Nemoto

    发明人： Raymond G. Beausoleil ,  William J. Munro ,  Timothy P. Spiller ,  Pieter Kok ,  Sean D. Barrett ,  Kae Nemoto

    IPC分类号： G01R13/00

    CPC分类号： B82Y10/00 ,  G06N99/002

    摘要： Various embodiments of the present invention are directed to methods for determining a phase shift acquired by an entangled N-qubit system represented by a NOON state. In one embodiment, a probe electromagnetic field is coupled with each qubit system. The phase shift acquired by the qubit systems is transferred to the probe electromagnetic field by transforming each qubit-system state into a linear superposition of qubit basis states. An intensity measurement is performed on the probe electromagnetic field in order to obtain a corresponding measurement result. A counter associated with a measurement-result interval is incremented, based on the measurement result falling within the measurement-result interval. A frequency distribution is produced by normalizing the counter associated with each measurement-result interval for a number of trials. The phase shift is determined by fitting a probability distribution associated with the probe electromagnetic field to the frequency distribution as a function of the phase shift.

    摘要翻译： 本发明的各种实施例涉及用于确定由NOON状态表示的纠缠的N量子比特系统获取的相移的方法。 在一个实施例中，探测电磁场与每个量子位系统耦合。 通过将每个量子位系统状态转换为量子位基状态的线性叠加，由量子位系统获取的相移被传送到探测电磁场。 对探头电磁场进行强度测量，以获得相应的测量结果。 基于测量结果间隔内的测量结果，与测量结果间隔相关联的计数器增加。 通过对与多个试验的每个测量结果间隔相关联的计数器进行归一化来产生频率分布。 通过将与探测电磁场相关联的概率分布拟合为频率分布来确定相移作为相移的函数。

    Non-demolition photon detector that preserves input state characteristics
    4.
    发明授权
    Non-demolition photon detector that preserves input state characteristics 有权
    保护输入状态特性的非破坏性光子检测器

    公开(公告)号：US07038188B2

    公开(公告)日：2006-05-02

    申请号：US10836012

    申请日：2004-04-29

    申请人： Raymond G. Beausoleil, Jr. ,  William J. Munro ,  Timothy P. Spiller ,  Kae Nemoto ,  Sean D. Barrett

    发明人： Raymond G. Beausoleil, Jr. ,  William J. Munro ,  Timothy P. Spiller ,  Kae Nemoto ,  Sean D. Barrett

    IPC分类号： H01L31/00

    CPC分类号： G06N99/002 ,  B82Y10/00

    摘要： A device capable of efficiently detecting a single-photon signal preserves a photon characteristic such as polarization or angular momentum. The device can include a beam splitter that splits an input photon state into modes that are distinguished by states of a characteristic of signal photons in the input photon state, a non-destructive measurement system capable of measuring a total number of photons in the modes without identifying a photon number for any individual one of the modes; and a beam combiner positioned to combine the modes after output from the non-destructive detection system.

    摘要翻译： 能够有效地检测单光子信号的装置保持诸如极化或角动量的光子特性。 该装置可以包括分束器，其将输入光子状态分解为通过输入光子状态中的信号光子的特性的状态来区分的模式，能够测量模式中的光子总数的无损测量系统， 识别任何单独的一种模式的光子数; 以及射束组合器，定位成在从非破坏性检测系统输出之后组合模式。

    Detecting one or more photons from their interactions with probe photons in a matter system
    5.
    发明授权
    Detecting one or more photons from their interactions with probe photons in a matter system 有权
    检测一个或多个光子与物质系统中与探针光子的相互作用

    公开(公告)号：US07002133B2

    公开(公告)日：2006-02-21

    申请号：US10678437

    申请日：2003-10-03

    申请人： Raymond G. Beausoleil ,  William J. Munro ,  Timothy P. Spiller ,  Kae Nemoto ,  Sean D. Barrett

    发明人： Raymond G. Beausoleil ,  William J. Munro ,  Timothy P. Spiller ,  Kae Nemoto ,  Sean D. Barrett

    IPC分类号： H01L31/00

    CPC分类号： G06N99/002 ,  B82Y10/00

    摘要： A device capable of efficiently detecting a single-photon signal includes a matter system, sources of a first beam and a second beam, and a measurement system. The matter system has a first energy level and a second energy level such that a signal photon couples to a transition between the first energy level and the second energy level. The first beam contains photons that couple to a transition between the second energy level and a third energy level of the matter system, and the second beam contains photons that couple to a transition between the third energy level and a fourth energy level of the matter system. The measurement system measures a change in the first or second beam to detect the absence, the presence, or the number of the photons in the signal.

    摘要翻译： 能够有效地检测单光子信号的装置包括物质系统，第一光束和第二光束的源以及测量系统。 物质系统具有第一能级和第二能级，使得信号光子耦合到第一能级和第二能级之间的转变。 第一光束包含耦合到物质系统的第二能级与第三能级之间的转变的光子，而第二光束包含耦合到物质系统的第三能级与第四能级之间的跃迁的光子 。 测量系统测量第一或第二光束的变化，以检测信号中光子的不存在，存在或数量。

    Methods for preparing entangled quantum states
    6.
    发明授权
    Methods for preparing entangled quantum states 有权
    制备纠缠量子态的方法

    公开(公告)号：US07836007B2

    公开(公告)日：2010-11-16

    申请号：US11343639

    申请日：2006-01-30

    申请人： Raymond G. Beausoleil ,  William J. Munro ,  Timothy P. Spillar ,  Pieter Kok ,  Sean D. Barrett ,  Kae Nemoto

    发明人： Raymond G. Beausoleil ,  William J. Munro ,  Timothy P. Spillar ,  Pieter Kok ,  Sean D. Barrett ,  Kae Nemoto

    IPC分类号： G06F15/00 ,  G06F15/18

    CPC分类号： B82Y10/00 ,  G06N99/002

    摘要： Various embodiments of the present invention are directed to methods for generating an entangled state of qubits. In one embodiment of the present invention, a method for preparing an entangled state of qubits comprises providing a probe and N non-interacting qubits, each qubit comprises a linear superposition of two basis states. The probe is transmitted into an interaction region that separately couples the probe to each of the qubits and produces a number of different probes. A linear superposition of states is output from the interaction region, each state in the linear superposition of states comprises a tensor product of entangled basis states and one of the different probes. The linear superposition of states is projected into one of the entangled states by measuring the state of the probe.

    摘要翻译： 本发明的各种实施例涉及用于产生量子位的纠缠状态的方法。 在本发明的一个实施例中，用于准备量子比特的纠缠状态的方法包括提供探测器和N个非相互作用的量子位，每个量子位包括两个基本状态的线性叠加。 探针被传输到相互作用区域中，该区域将探针分别耦合到每个量子位并产生许多不同的探针。 从交互区域输出状态的线性叠加，状态的线性叠加中的每个状态包括纠缠基状态的张量乘积和不同探针中的一个。 通过测量探针的状态将状态的线性叠加投影到纠缠状态之一。

    Quantum coherent systems and operations
    9.
    发明授权
    Quantum coherent systems and operations 失效
    量子相干系统和操作

    公开(公告)号：US07791780B2

    公开(公告)日：2010-09-07

    申请号：US11658427

    申请日：2005-06-28

    申请人： William J. Munro ,  Timothy P. Spiller ,  Kae Nemoto

    发明人： William J. Munro ,  Timothy P. Spiller ,  Kae Nemoto

    IPC分类号： G06E3/00 ,  G02F3/00

    CPC分类号： G06N99/002 ,  B82Y10/00

    摘要： Nonlinear elements can efficiently implement quantum information processing systems such as controlled phase shifters, non-absorbing detectors including parity detectors, quantum subspace projections, non-absorbing Bell state analyzers, non-absorbing encoders/entanglers, and fundamental quantum gates such as CNOT gates. The non-absorbing detectors permit improvements in the efficiency of a probabilistic quantum gate by permitting reuse of the same photonic resources during multiple passes through the probabilistic gate.

    摘要翻译： 非线性元件可以有效地实现量子信息处理系统，例如受控移相器，非吸收检测器，包括奇偶检测器，量子子空间投影，非吸收贝尔状态分析器，非吸收编码器/纠缠器，以及诸如CNOT门的基本量子门。 非吸收检测器允许通过在多次通过概率门之间重复使用相同的光子资源来提高概率量子门的效率。

    Quantum repeater
    10.
    发明授权
    Quantum repeater 有权
    量子中继器

    公开(公告)号：US08135276B2

    公开(公告)日：2012-03-13

    申请号：US11990421

    申请日：2006-08-11

    申请人： William J. Munro ,  Kae Nemoto ,  Peter Van Loock ,  Yoshihisa Yamamoto

    发明人： William J. Munro ,  Kae Nemoto ,  Peter Van Loock ,  Yoshihisa Yamamoto

    IPC分类号： H04K3/00

    CPC分类号： G06N99/002 ,  B82Y10/00 ,  H04B10/291 ,  H04B10/70 ,  H04L9/0855

    摘要： A quantum repeater includes a transmitter portion including a source, a set of matter systems, and an optical system. The source produces a probe pulse in a probe state having components with different photon numbers, and each matter system has at least one state that interacts with photons in the probe pulse to introduce a change in a phase space location of the probe state. The optical system can direct the probe pulse for interaction with one of the matter systems and direct light from the matter system for transmission on a first channel.

    摘要翻译： 量子转发器包括包括源，一组物质系统和光学系统的发射器部分。 源产生具有不同光子数的分量的探针状态的探针脉冲，并且每个物质系统具有与探针脉冲中的光子相互作用的至少一种状态，以引入探针状态的相位空间位置的变化。 光学系统可以引导探针脉冲用于与物质系统之一相互作用并且引导来自物质系统的光在第一通道上传输。