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1. 发明申请

US20070215862A1 Methods for preparing entangled quantum states 有权
标题翻译：制备纠缠量子态的方法
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
IPC分类号： H01L39/22 , G06G7/12
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。

2. 发明申请

US20070250280A1 Methods for determining relative phase differences in entangled quantum states 失效
标题翻译：确定纠缠量子态相对相位差的方法
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。

3. 发明申请

US20060017992A1 Nonlinear electromagnetic quantum information processing 有权
标题翻译：非线性电磁量子信息处理
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。

4. 发明申请

US20070145271A1 Quantum information conversion between matter and light representations 有权
标题翻译：物质和光表示之间的量子信息转换
公开(公告)号：US20070145271A1
公开(公告)日：2007-06-28
申请号：US11252964
申请日：2005-10-17
申请人： Raymond Beausoleil , William Munro , Timothy Spiller , Kae Nemoto
发明人： Raymond Beausoleil , William Munro , Timothy Spiller , Kae Nemoto
IPC分类号： H04B10/08 , G03G5/16
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。

5. 发明申请

US20050254823A1 Quantum optical state converter 有权
标题翻译：量子光学状态转换器
公开(公告)号：US20050254823A1
公开(公告)日：2005-11-17
申请号：US10837129
申请日：2004-04-30
申请人： Raymond Beausoleil , William Munro , Timothy Spiller , Kae Nemoto
发明人： Raymond Beausoleil , William Munro , Timothy Spiller , Kae Nemoto
IPC分类号： G06N99/00 , H04B10/00
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。

6. 发明授权

US07836007B2 Methods for preparing entangled quantum states 有权
标题翻译：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。

7. 发明申请

US20080310000A1 Quantum Coherent Systems and Operations 失效
标题翻译：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。

8. 发明授权

US07426444B2 Methods for determining relative phase differences in entangled quantum states 失效
标题翻译：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。

9. 发明授权

US07133173B2 Nonlinear electromagnetic quantum information processing 有权
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.

10. 发明申请

US20120134675A1 Quantum Repeater And System And Method For Creating Extended Entanglements 失效
标题翻译：量子中继器和系统以及创建扩展纠缠的方法
公开(公告)号：US20120134675A1
公开(公告)日：2012-05-31
申请号：US13319372
申请日：2009-10-26
申请人： William Munro , Keith Harrison , Timothy Spiller , Kae Nemoto
发明人： William Munro , Keith Harrison , Timothy Spiller , Kae Nemoto
IPC分类号： H04J14/00
CPC分类号： H04L9/0855 , B82Y10/00 , G06N99/002 , H04B10/70 , H04L2209/38
摘要： An iterative method is provided for progressively building an end-to-end entanglement between qubits in first and second end nodes (91, 92) of a chain of nodes whose intermediate nodes (90) are quantum repeaters. At each iteration, a current operative repeater (90) of the chain merges an entanglement existing between qubits in the first end node (91) and the operative repeater, with a local entanglement formed between qubits in the operative repeater and its neighbour node towards the second end node (92). For the first iteration, the operative repeater is the neighbour of the first end node (91); thereafter, for each new iteration the operative repeater shifts one node further along the chain toward the second end node (92). A quantum repeater adapted for implementing this method is also provided.
摘要翻译：提供了一种迭代方法，用于逐渐构建中间节点（90）是量子中继器的节点链的第一和第二端节点（91,92）中的量子比特之间的端到端纠缠。在每次迭代中，链的当前可操作中继器（90）将存在于第一端节点（91）中的量子位与可操作中继器之间的纠缠与在可操作中继器中的量子比特和其邻居节点之间形成的局部纠缠相结合第二端节点（92）。对于第一次迭代，操作中继器是第一端节点（91）的邻居; 此后，对于每个新的迭代，可操作中继器沿着链条进一步向第二端节点（92）移动一个节点。还提供了适用于实现该方法的量子中继器。

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