公开(公告)号：US08781334B2

公开(公告)日：2014-07-15

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： H04B10/00

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 neighbor node towards the second end node (92). For the first iteration, the operative repeater is the neighbor 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，链路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。

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。

公开(公告)号：US20120093521A1

公开(公告)日：2012-04-19

申请号：US13378252

申请日：2009-10-26

申请人： Keith Harrison ,  William Munro ,  Kae Nemoto

发明人： Keith Harrison ,  William Munro ,  Kae Nemoto

IPC分类号： H04B10/16

CPC分类号： H04L9/0855 ,  B82Y10/00 ,  G06N10/00

摘要： A method is provided of creating an end-to-end entanglement (89) between qubits in first and second end nodes (81L, 81R) of a chain of optically-coupled nodes whose intermediate nodes (80) are quantum repeaters. Local entanglements (85) are created between qubits in neighbouring pairs in the chain through interaction of the qubits with light fields transmitted between the nodes. A trigger (82) propagated along the chain from one end node (81L), sequentially enables each quantum repeater (100; 210) to effect a top-level cycle of operation. In each such cycle, a repeater (80) initiates a merging of two entanglements involving respective repeater qubits that are at least expected to be entangled with qubits in nodes disposed in opposite directions along the chain from the repeater. A quantum repeater (80) adapted for implementing this method is also provided.

摘要翻译： 提供了一种在其中间节点（80）是量子中继器的光耦合节点链的第一和第二端节点（81L，81R）中的量子比特之间产生端到端纠缠（89）的方法。 通过量子位与节点之间传输的光场的相互作用，在链中的相邻对中的量子位之间产生局部纠缠（85）。 沿着链从一个端节点（81L）传播的触发器（82）顺序使得每个量子转发器（100; 210）能够实现顶层操作循环。 在每个这样的周期中，中继器（80）启动两个缠结的两个纠缠，这两个纠缠涉及相应的中继器量子位，这些纠错器量化位置至少预期与沿着来自中继器的链路沿相反方向布置的节点中的量子位相互纠缠。 还提供了适于实现该方法的量子中继器（80）。

公开(公告)号：US09111229B2

公开(公告)日：2015-08-18

申请号：US13378383

申请日：2009-10-26

申请人： Keith Harrison ,  William Munro ,  Kae Nemoto

发明人： Keith Harrison ,  William Munro ,  Kae Nemoto

IPC分类号： H04B10/02 ,  G06N99/00 ,  B82Y10/00 ,  H04L9/08 ,  H04L9/12

CPC分类号： G06N99/002 ,  B82Y10/00 ,  H04L9/0855 ,  H04L9/12 ,  H04L2209/38

摘要： A method is provided of creating an end-to-end entanglement (87) between qubits in first and second end nodes (81, 82) of a chain of optically-coupled nodes whose intermediate nodes (80) are quantum repeaters. Local entanglements (85) are created on an on-going basis between qubits in neighboring pairs in the chain through interaction of the qubits with light fields transmitted between the nodes. The quantum repeaters (80) are cyclically operated with their top-level operating cycles being synchronized. Once every top-level operating cycle, each repeater (80) initiates a merging of two entanglements involving respective repeater qubits that are at least expected to be entangled with qubits in nodes disposed in opposite directions along the chain from the repeater. A quantum repeater (80) adapted for implementing this method is also provided.

摘要翻译： 提供了一种在其中间节点（80）是量子中继器的光耦合节点链的第一和第二端节点（81,82）中的量子位之间产生端到端纠缠（87）的方法。 通过量子位与节点之间传输的光场的相互作用，在链中邻近对中的量子位之间在持续的基础上创建局部纠缠（85）。 量子中继器（80）在其顶级操作周期同步的情况下循环运行。 一旦每个顶级操作周期，每个中继器（80）启动涉及相关中继器量子位的两个纠缠的合并，这些纠错至少预期与沿着来自中继器的链路沿相反方向布置的节点中的量子比特纠缠。 还提供了适于实现该方法的量子中继器（80）。

公开(公告)号：US20120148237A1

公开(公告)日：2012-06-14

申请号：US13378383

申请日：2009-10-26

申请人： Keith Harrison ,  William Munro ,  Kae Nemoto

发明人： Keith Harrison ,  William Munro ,  Kae Nemoto

IPC分类号： H04B10/16 ,  H04B10/08

CPC分类号： G06N99/002 ,  B82Y10/00 ,  H04L9/0855 ,  H04L9/12 ,  H04L2209/38

摘要： A method is provided of creating an end-to-end entanglement (87) between qubits in first and second end nodes (81, 82) of a chain of optically-coupled nodes whose intermediate nodes (80) are quantum repeaters. Local entanglements (85) are created on an on-going basis between qubits in neighbouring pairs in the chain through interaction of the qubits with light fields transmitted between the nodes. The quantum repeaters (80) are cyclically operated with their top-level operating cycles being synchronized. Once every top-level operating cycle, each repeater (80) initiates a merging of two entanglements involving respective repeater qubits that are at least expected to be entangled with qubits in nodes disposed in opposite directions along the chain from the repeater. A quantum repeater (80) adapted for implementing this method is also provided.

摘要翻译： 提供了一种在其中间节点（80）是量子中继器的光耦合节点链的第一和第二端节点（81,82）中的量子位之间产生端到端纠缠（87）的方法。 通过量子位与节点之间传输的光场的相互作用，在链中邻近对中的量子位之间在持续的基础上创建局部纠缠（85）。 量子中继器（80）在其顶级操作周期同步的情况下循环运行。 一旦每个顶级操作周期，每个中继器（80）启动涉及相关中继器量子位的两个纠缠的合并，这些纠错至少预期与沿着来自中继器的链路沿相反方向布置的节点中的量子比特纠缠。 还提供了适于实现该方法的量子中继器（80）。

公开(公告)号：US20120050834A1

公开(公告)日：2012-03-01

申请号：US13318689

申请日：2009-10-26

申请人： Keith Harrison ,  William Munro ,  Kae Nemoto

发明人： Keith Harrison ,  William Munro ,  Kae Nemoto

IPC分类号： G06E3/00

CPC分类号： H04L9/0855 ,  B82Y10/00 ,  G06N10/00 ,  H04B10/70 ,  H04L2209/38

摘要： A method and apparatus (70) are provided for creating an entanglement between two qubits situated in spaced nodes (71, 72) and coupled by an optical channel (75). One node (71) supports a plurality of qubits (73) and is arranged to pass a respective light field through each qubit and on into the optical channel (75), so as to produce a train (78) of closely-spaced light fields on the optical channel (75). The other node (72) supports a target qubit (74) and is arranged to receive the light-field train (78), to allow each successive light field to pass through, and potentially interact with, the target qubit (74) while the latter remains un-entangled, and to thereafter measure each light field to determine whether the latter has been successfully entangled. Upon the second node (72) determining that the target qubit (74) has become entangled, it inhibits the interaction of further light fields with the target qubit.

摘要翻译： 提供了一种方法和装置（70），用于在位于间隔节点（71,72）中的两个量子位之间产生纠缠并由光通道（75）耦合。 一个节点（71）支持多个量子位（73），并且被布置成使相应的光场通过每个量子位并进入光学通道（75），以便产生紧密间隔的光场的火车（78） 在光通道（75）上。 另一个节点（72）支持目标量子位（74）并且被布置成接收光场列（78），以允许每个连续的光场通过并且潜在地与目标量子位（74）相互作用，而 后者保持未纠缠，并且此后测量每个光场以确定后者是否已被成功纠缠。 在第二节点（72）确定目标量子比特（74）已经变得纠缠的情况下，它阻止了进一步的光场与目标量子位的相互作用。

公开(公告)号：US20090310784A1

公开(公告)日：2009-12-17

申请号：US12469571

申请日：2009-05-20

申请人： Joanna Duligall ,  Keith Harrison ,  William Munro ,  Timothy Spiller ,  Radu Ionicioiu

发明人： Joanna Duligall ,  Keith Harrison ,  William Munro ,  Timothy Spiller ,  Radu Ionicioiu

IPC分类号： H04L9/18 ,  H04L9/08

CPC分类号： H04B10/1141 ,  H04L9/0852

摘要： QKD receiving apparatus is provided with an alignment-correction system for correcting misalignment of a quantum signal received at an optical port of the apparatus relative to a quantum-signal detector of the receiving apparatus. The alignment-correction system comprises a misalignment measuring subsystem for making multiple different misalignment measures, and a misalignment compensation subsystem for adjusting the relative alignment of the quantum signal and quantum-signal detector in dependence on the misalignment measures made. The misalignment measuring subsystem comprises an alignment-beam source, an alignment-beam detector arrangement, and optical components for guiding an alignment beam from the alignment-beam source to the optical port, and for guiding the alignment beam, after external retro-reflection at a cooperating QKD transmitting apparatus from the optical port to the alignment-beam detector arrangement.

摘要翻译： QKD接收装置设置有对准校正系统，用于校正在装置的光口处接收的量子信号相对于接收装置的量子信号检测器的未对准。 对准校正系统包括用于进行多个不同对准测量的未对准测量子系统，以及用于根据所做的不对准测量来调整量子信号和量子信号检测器的相对对准的未对准补偿子系统。 不对准测量子系统包括对准束源，对准束检测器装置和用于将对准光束从对准光束源引导到光学端口的光学部件，并且用于在外部后向反射之后引导对准光束 从光端口到对准束检测器装置的协作QKD发送装置。

公开(公告)号：US20070074276A1

公开(公告)日：2007-03-29

申请号：US11490478

申请日：2006-07-19

申请人： Keith Harrison ,  Christopher Tofts ,  Timothy Spiller ,  Martin Sadler ,  William Munro

发明人： Keith Harrison ,  Christopher Tofts ,  Timothy Spiller ,  Martin Sadler ,  William Munro

IPC分类号： H04L9/32

CPC分类号： H04L9/0656 ,  H04L9/0852 ,  H04L9/3226 ,  H04L2209/127 ,  H04L2209/56

摘要： A system is disclosed in which a plurality of devices are arranged to use one-time pad data to interact with apparatus holding the same one-time pad data. Each of the devices and the apparatus has its own one-time pad and the pads are all provisioned with the same new one-time pad data. Upon any one of the devices wishing to effect an interaction with the apparatus using one-time pad data, an alignment operation is carried out between a set of entities comprising at least the apparatus and the device wishing to carry out the interaction. The alignment operation serves to reduce the level of the one-time pad of at least the device wishing to carry out the interaction, to the level of the lowest one-time pad of the set of entities involved in the alignment operation.

摘要翻译： 公开了一种系统，其中多个设备被布置为使用一次性焊盘数据与保持相同的一次性焊盘数据的设备进行交互。 每个设备和设备具有其自己的一次性焊盘，并且焊盘都具有相同的新的一次性焊盘数据。 在希望使用一次性衬垫数据实现与装置的交互的任何一个设备中，在至少包括希望执行交互的设备和设备的一组实体之间执行对准操作。 对准操作用于将至少希望执行交互的设备的一次性焊盘的级别降低到对齐操作中涉及的一组实体中的最低一次性焊盘的级别。

公开(公告)号：US20070172054A1

公开(公告)日：2007-07-26

申请号：US11489750

申请日：2006-07-17

申请人： William Munro ,  Timothy Spiller ,  Martin Sadler ,  Christopher Tofts ,  Keith Harrison

发明人： William Munro ,  Timothy Spiller ,  Martin Sadler ,  Christopher Tofts ,  Keith Harrison

IPC分类号： H04L9/28

CPC分类号： H04L9/0656 ,  H04L9/0852 ,  H04L9/3226 ,  H04L2209/127 ,  H04L2209/56

摘要： A device stores one-time pad data for use in carrying out various tasks. In order to preserve the ability to carry out important tasks that require the use of one-time data, use of the one-time pad data held by the device is controlled such that an amount of this one-time pad data is only usable by a predetermined set of important tasks comprising at least a replenishment task for replenishing the device with one-time pad data.

摘要翻译： 设备存储用于执行各种任务的一次性填充数据。 为了保持执行需要使用一次数据的重要任务的能力，控制由设备保持的一次性焊盘数据的使用，使得该一次性焊盘数据的量仅可由 一组预定的重要任务，其至少包括用于用一次性填充数据补充设备的补充任务。

公开(公告)号：US20070016794A1

公开(公告)日：2007-01-18

申请号：US11455231

申请日：2006-06-16

申请人： Keith Harrison ,  Timothy Spiller ,  William Munro ,  Christopher Tofts

发明人： Keith Harrison ,  Timothy Spiller ,  William Munro ,  Christopher Tofts

IPC分类号： H04L9/00

CPC分类号： H04L9/0656 ,  H04L9/0852 ,  H04L9/3226 ,  H04L2209/127 ,  H04L2209/56

摘要： In carrying out a task that consumes data from a one-time pad, task inputs comprising at least first data and second data from the pad, are combined together to form an output from which the data used from the pad cannot be recovered without knowledge of at least one of the first and second data. The task concerned can be, for example, the encrypting of a message or the creating of an attribute verifier.

摘要翻译： 在执行从一次性焊盘消耗数据的任务时，包括至少第一数据和来自焊盘的第二数据的任务输入被组合在一起以形成输出，从该焊盘所使用的数据不能被恢复，而不知道 第一和第二数据中的至少一个。 所涉及的任务可以是例如加密消息或创建属性验证器。