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公开(公告)号：US20070252081A1
公开(公告)日：2007-11-01
申请号：US11632596
申请日：2005-07-13
申请人： William Munro , Timothy Spiller , Sean Barrett , Pieter Kok
发明人： William Munro , Timothy Spiller , Sean Barrett , Pieter Kok
IPC分类号： H01J49/00
CPC分类号： G06N99/002 , B82Y10/00
摘要： We propose a practical method to generate cluster states for quantum computers. The qubit systems can be NV-centers in diamond, Pauli-blockade quantum dots with an excess electron or ion traps with optical transitions, which are subsequently entangled using a so-called double-heralded single-photon detection scheme. The fidelity of the resulting entanglement is extremely robust against the most important practical errors such as detector loss, light collection efficiency and mode mismatching. The cluster states are generated efficiently using a modified probabilistic teleportation protocol.
摘要翻译： 我们提出了一种生成量子计算机的集群状态的实用方法。 量子比特系统可以是金刚石中的NV中心，具有过量电子或具有光学跃迁的离子陷阱的Pauli阻挡量子点，随后使用所谓的双重预先单光子检测方案进行纠缠。 所产生的纠缠的保真度对于最重要的实际误差如检测器损耗，光收集效率和模式不匹配是非常强大的。 使用修改的概率传送协议有效地生成集群状态。
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2.发明申请公开(公告)号：US20070250280A1
公开(公告)日：2007-10-25
申请号：US11407600
申请日：2006-04-19
申请人： Raymond Beausoleil , William Munro , Timothy Spiller , Pieter Kok , Sean Barrett , Kae Nemoto
发明人： Raymond Beausoleil , William Munro , Timothy Spiller , Pieter Kok , Sean Barrett , Kae Nemoto
IPC分类号： G06F19/00
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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公开(公告)号：US20060017992A1
公开(公告)日：2006-01-26
申请号：US10899332
申请日：2004-07-26
申请人： Raymond Beausoleil , William Munro , Timothy Spiller , Sean Barrett , Pieter Kok , Kae Nemoto
发明人： Raymond Beausoleil , William Munro , Timothy Spiller , Sean 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.
摘要翻译： 非线性电磁元件可以有效地实现量子信息处理任务，例如受控相移，非拆迁状态检测，量子子空间投影，非拆分贝尔状态分析，预兆状态准备，量子非拆分编码和基本量子门操作。 直接使用电磁非线性可以放大小相移，并以高操作效率以接近确定的方式使用前馈系统。 使用零差检测器的测量可以导致由测量结果识别的希尔伯特子空间上的输入状态的近似确定性投影。 如果需要，前馈操作可以改变投影状态，以达到接近100％效率的期望的输出状态。
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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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5.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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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：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
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。
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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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公开(公告)号：US20070215862A1
公开(公告)日：2007-09-20
申请号：US11343639
申请日：2006-01-30
申请人： Raymond Beausoleil , William Munro , Timothy Spillar , Pieter Kok , Sean Barrett , Kae Nemoto
发明人： Raymond Beausoleil , William Munro , Timothy Spillar , Pieter Kok , Sean Barrett , Kae Nemoto
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。
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