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公开(公告)号：US07133173B2
公开(公告)日：2006-11-07
申请号：US10899332
申请日：2004-07-26
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
CPC分类号： G06N99/002 , B82Y10/00
摘要： Nonlinear electromagnetic elements can efficiently implement quantum information processing tasks such as controlled phase shifts, non-demolition state detection, quantum subspace projections, non-demolition Bell state analysis, heralded state preparation, quantum non-demolition encoding, and fundamental quantum gate operations. Direct use of electromagnetic non-linearity can amplify small phase shifts and use feed forward systems in a near deterministic manner with high operating efficiency. Measurements using homodyne detectors can cause near deterministic projection of input states on a Hilbert subspace identified by the measurement results. Feed forward operation can then alter the projected state if desired to achieve a desired output state with near 100% efficiency.
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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
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。
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3.发明授权公开(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。
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4.发明授权公开(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。
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5.发明授权公开(公告)号：US07449672B2
公开(公告)日：2008-11-11
申请号：US10837129
申请日：2004-04-30
IPC分类号： H01J40/14
CPC分类号： G06N99/002 , B82Y10/00
摘要： Systems and methods convert or transfer quantum information from one photonic representation or state to another. This permits conversion of quantum information from one encoding to another and to representations that are convenient, efficient, or required for desired manipulations.
摘要翻译： 系统和方法将量子信息从一个光子表示或状态转换或传输到另一个。 这允许将量子信息从一个编码转换到另一个编码，以及对于期望的操作而言方便，有效或所需的表示。
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6.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
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。
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公开(公告)号：US07554080B2
公开(公告)日：2009-06-30
申请号：US11632596
申请日：2005-07-13
CPC分类号： G06N99/002 , B82Y10/00
摘要： The states of matter system (110) having only ones basis state that couples to an excited state can be entangled using measurements of photons during transitions from the excited state. High efficiency of entanglement operation can be achieved by repeating the measurements after performing bit flips on the matter systems (110). High efficiency of entanglement operation can be achieved using non-absorbing parity measurements on the emitted photons so that measured photons can be subsequently manipulated and measured to near-deterministically produce entangled states. Such entanglement operations can be employed to construct cluster states suitable for simulating arbitrary logic networks.
摘要翻译： 只有具有耦合到激发态的基础状态的物质系统（110）的状态可以使用从激发态转变期间的光子的测量来纠缠。 可以通过在物质系统（110）上执行位翻转之后重复测量来实现纠缠操作的高效率。 可以使用发射的光子上的非吸收奇偶校验测量来实现纠缠操作的高效率，使得随后可以操作和测量测量的光子以接近确定地产生纠缠状态。 可以采用这种纠缠操作来构建适合于模拟任意逻辑网络的聚类状态。
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公开(公告)号：US07483142B2
公开(公告)日：2009-01-27
申请号：US11417614
申请日：2006-05-03
IPC分类号： G01B9/02
CPC分类号： H04B10/70
摘要： A security system uses a source capable of producing an entangled state of a sensing mode and a reference mode. The sensing mode has a path that enters an area around an object being secured. A state measurement system in the security system can measure a combination of the sensing mode after traversal of the sensing path and the reference mode after traversal of a reference path.
摘要翻译： 安全系统使用能够产生感测模式和参考模式的纠缠状态的源。 感测模式具有进入被保护物体周围的区域的路径。 安全系统中的状态测量系统可以在遍历参考路径之后测量感测路径遍历之后的感测模式与参考模式的组合。
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公开(公告)号：US08023828B2
公开(公告)日：2011-09-20
申请号：US11252964
申请日：2005-10-17
CPC分类号： B82Y10/00 , G06N99/002
摘要： Structures and methods allow: transfer of quantum information represented using the states of light to a representation using the states of matter systems; transfer of quantum information represented by the states of matter systems to a representation using the states of light; and error resistant encoding of quantum information using entangled states of matter and light to minimize errors.
摘要翻译： 结构和方法允许：将使用光的状态表示的量子信息转移到使用物质系统状态的表示; 将由物质系统状态表示的量子信息转移到使用光的状态的表示; 并使用物质和光的纠缠状态对量子信息进行误差编码，以最小化误差。
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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
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。
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