-
公开(公告)号：US08170214B2
公开(公告)日：2012-05-01
申请号：US12286854
申请日：2008-10-01
申请人： Keith Harrison , William Munro , Timothy Spiller , Michael Tan , Joanna Duligall , Radu Ionicioiu
发明人： Keith Harrison , William Munro , Timothy Spiller , Michael Tan , Joanna Duligall , Radu Ionicioiu
IPC分类号： H04L29/06
CPC分类号： H04B10/114 , H04B10/70 , H04L9/0858
摘要： In order to facilitate alignment of a QKD transmitter and QKD receiver, the transmitter is provided with a retro-reflector for returning to the receiver a photon beam originating at the latter. The transmitter is arranged to polarization modulate the retro-reflected beam. The transmitter is provided both with an intensity detector for generating an indication of retro-reflected photon intensity, and an intensity-dependent controller for controlling the QKD transmitter in dependence on the detected photon intensity. In one embodiment, this control involves aborting operation of the QKD transmitter upon an unexpectedly high photon intensity being detected; in another embodiment, the intensity indication is used to control the attenuation of the retro-reflected beam so as stabilize the average retro-reflected photon count per unit time.
摘要翻译： 为了便于QKD发射机和QKD接收机的对准，发射机设有一个回射器，用于将源自后者的光子束返回给接收机。 发射机被布置成偏振调制后向反射光束。 发射机都具有用于产生反射光子强度的指示的强度检测器，以及依赖于检测到的光子强度来控制QKD发射器的强度依赖控制器。 在一个实施例中，该控制涉及在检测到意外高的光子强度时中止QKD发射机的操作; 在另一个实施例中，强度指示用于控制反射光束的衰减，以便稳定每单位时间的平均反射光子数。
-
公开(公告)号：US20100080394A1
公开(公告)日：2010-04-01
申请号：US12286854
申请日：2008-10-01
申请人： Keith Harrison , William Munro , Timothy Spiller , Michael Tan , Joanna Duligall , Radu Ionicioiu
发明人： Keith Harrison , William Munro , Timothy Spiller , Michael Tan , Joanna Duligall , Radu Ionicioiu
CPC分类号： H04B10/114 , H04B10/70 , H04L9/0858
摘要： In order to facilitate alignment of a QKD transmitter and QKD receiver, the transmitter is provided with a retro-reflector for returning to the receiver a photon beam originating at the latter. The transmitter is arranged to polarization modulate the retro-reflected beam. The transmitter is provided both with an intensity detector for generating an indication of retro-reflected photon intensity, and an intensity-dependent controller for controlling the QKD transmitter in dependence on the detected photon intensity. In one embodiment, this control involves aborting operation of the QKD transmitter upon an unexpectedly high photon intensity being detected; in another embodiment, the intensity indication is used to control the attenuation of the retro-reflected beam so as stabilize the average retro-reflected photon count per unit time.
摘要翻译： 为了便于QKD发射机和QKD接收机的对准，发射机设有一个回射器，用于将源自后者的光子束返回给接收机。 发射机被布置成偏振调制后向反射光束。 发射机都具有用于产生反射光子强度的指示的强度检测器，以及依赖于检测到的光子强度来控制QKD发射器的强度依赖控制器。 在一个实施例中，该控制涉及在检测到意外高的光子强度时中止QKD发射机的操作; 在另一个实施例中，强度指示用于控制反射光束的衰减，以便稳定每单位时间的平均反射光子数。
-
公开(公告)号：US20090310784A1
公开(公告)日：2009-12-17
申请号：US12469571
申请日：2009-05-20
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：US20120039617A1
公开(公告)日：2012-02-16
申请号：US13260095
申请日：2009-07-31
CPC分类号： H04B10/1141 , H04B10/70 , H04L9/0858 , H04L2209/805
摘要： A handheld device (310) includes: a transmitter or receiver (410) of a signal beam (340) for quantum key distribution; and a source (412, 414) of alignment beams (312, 314, 316, 318) that diverge from each other in a pattern that matches sensors (322, 324, 326, 328) on a station (320) containing a receiver or transmitter (430) for the quantum key distribution. The alignment beams from the handheld device (310) are of sufficient intensity to produce on the station visible spots that facilitate manual alignment of the handheld device (310). The station (320) can measure a position and a direction of respective alignment beams and dynamically steer the signal beam (340) according to the measurements.
摘要翻译： 手持设备（310）包括：用于量子密钥分发的信号光束（340）的发射器或接收器（410）; 以及以包含接收器的站（320）上匹配传感器（322,324,326,328）的图案彼此分开的对准光束（312,314,316,318）的源（412,414），或 发射机（430）用于量子密钥分发。 来自手持设备（310）的对准光束具有足够的强度，以在所述工作台上产生便于手持设备（310）的手动对准的可见光点。 站（320）可以测量各个对准束的位置和方向，并根据测量动态地引导信号光束（340）。
-
公开(公告)号：US08774638B2
公开(公告)日：2014-07-08
申请号：US13260095
申请日：2009-07-31
IPC分类号： H04B10/00
CPC分类号： H04B10/1141 , H04B10/70 , H04L9/0858 , H04L2209/805
摘要： A handheld device includes: a transmitter or receiver of a signal beam for quantum key distribution; and a source of alignment beams that diverge from each other in a pattern that matches sensors on a station containing a receiver or transmitter for the quantum key distribution. The alignment beams from the handheld device are of sufficient intensity to produce on the station visible spots that facilitate manual alignment of the handheld device. The station can measure a position and a direction of respective alignment beams and dynamically steer the signal beam according to the measurements.
摘要翻译： 手持设备包括：用于量子密钥分发的信号光束的发射器或接收器; 以及与包含用于量子密钥分发的接收机或发射机的站上的传感器相匹配的模式彼此发散的对准射束源。 来自手持设备的对准束具有足够的强度，以在站上产生便于手持设备的手动对准的可见点。 站可以测量各个对准束的位置和方向，并根据测量动态地引导信号光束。
-
6.发明申请Method of operating a one-time pad system and a system for implementing this method 审中-公开操作一次性垫系统的方法和实现该方法的系统公开(公告)号：US20070074276A1
公开(公告)日：2007-03-29
申请号：US11490478
申请日：2006-07-19
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。
-
7.发明授权公开(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。
-
8.发明申请公开(公告)号：US20070172054A1
公开(公告)日：2007-07-26
申请号：US11489750
申请日：2006-07-17
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
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。
-
10.发明申请公开(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。
-
-
-
-
-
-
-
-
-
搜索结果
25 条记录 (耗时 0.025 秒)