公开(公告)号：US08582769B2

公开(公告)日：2013-11-12

申请号：US12846915

申请日：2010-07-30

申请人： Yi Zhao ,  Martin Roetteler ,  Lei Xu ,  Ting Wang

发明人： Yi Zhao ,  Martin Roetteler ,  Lei Xu ,  Ting Wang

IPC分类号： H04K1/00

CPC分类号： H04L9/0852

摘要： Systems and methods to communicate securely includes communicating quantum encryption data on a first wavelength-division multiplexing passive optical network (WDM-PON); and communicating data over separate classical channels of a second WDM-PON, wherein the second WDM-PON synchronizes with the first WDM-PON while providing data communication over the classical channels.

摘要翻译： 用于安全通信的系统和方法包括在第一波分复用无源光网络（WDM-PON）上传送量子加密数据; 以及在第二WDM-PON的单独的经典信道上传送数据，其中所述第二WDM-PON与所述第一WDM-PON同步，同时在经典信道上提供数据通信。

公开(公告)号：US08315969B2

公开(公告)日：2012-11-20

申请号：US12371941

申请日：2009-02-17

申请人： Martin Roetteler

发明人： Martin Roetteler

IPC分类号： G06F9/44 ,  G06N7/02

CPC分类号： G06N99/002 ,  B82Y10/00

摘要： A method includes performing quantum state tomography from the statistics of a collection of measurements, each of which has only two possible outcomes and has the feature of being a measurement of a single qubit. By carefully choosing the measurements it becomes possible to infer the state of a quantum system from the statistics. Moreover, the function which computes the state from the measurement statistics can be computed efficiently in the dimension of the underlying system. Reconstructing the quantum state is performed in accordance with the following expression: ρ = ( 2 d ⁢ ∑ i = 1 d 2 - 1 ⁢ ⁢ p i ⁢ P i + ( 1 - p i ) ⁢ ( 1 - P i ) ) - ( d 2 - 2 d ) ⁢ I d , where d is the dimension of the quantum mechanical system, ρ is the state of the quantum mechanical system, Id denotes the identity operator, Pi is one of the plurality of measurement projectors, and pi is the probability for the measurement projector Pi.

摘要翻译： 一种方法包括从测量集合的统计量中进行量子态断层摄影，每个测量集合仅具有两个可能的结果，并且具有作为单个量子位的测量的特征。 通过仔细选择测量，可以从统计学中推断量子系统的状态。 此外，可以在基础系统的维度中有效地计算从测量统计量计算状态的函数。 根据以下表达式进行重构量子态：＆rgr; =（2 d＆Sigma; i = 1 d 2 - 1（t）]]>其中，d是维度（1-p i） 的量子力学系统 是量子力学系统的状态，Id表示识别算子，Pi是多个测量投影仪之一，pi是测量投影仪Pi的概率。

公开(公告)号：US20120210111A1

公开(公告)日：2012-08-16

申请号：US13362628

申请日：2012-01-31

申请人： Maris Ozols ,  Martin Roetteler ,  Jérémie Roland

发明人： Maris Ozols ,  Martin Roetteler ,  Jérémie Roland

IPC分类号： G06F9/00

CPC分类号： G06N99/002 ,  B82Y10/00

摘要： Systems and methods for transforming an initial quantum state to a target quantum state are disclosed. The initial quantum state is denoted by superposed initial quantum sample states and the target quantum state is denoted by superposed target quantum sample states. The initial quantum state is initialized with a set of primary registers for the initial quantum state and with at least one ancillary register. The initial quantum state is transformed such that the set of primary registers reflects the initial quantum sample states and the at least one ancillary register is varied to compose an intermediate quantum state. In addition, the intermediate quantum state is amplified by implementing quantum state rotations in accordance with a plurality of reflections on the intermediate quantum state such that the reflections result in the target quantum sample states of the target quantum state with a discarding of the at least one ancillary register.

摘要翻译： 公开了将初始量子态转换成目标量子态的系统和方法。 初始量子态由叠加的初始量子样本状态表示，并且目标量子态由叠加的目标量子样本状态表示。 初始量子态由初始量子态的一组初级寄存器和至少一个辅助寄存器初始化。 变换初始量子态使得初级寄存器的集合反映了初始量子样本状态，并且至少一个辅助寄存器被改变以构成中间量子态。 此外，通过根据中间量子态上的多个反射实施量子态旋转来放大中间量子态，使得反射导致目标量子态的目标量子样本状态，并丢弃至少一个 辅助登记

公开(公告)号：US08089286B2

公开(公告)日：2012-01-03

申请号：US12182378

申请日：2008-07-30

申请人： Marcus Silva ,  Martin Roetteler

发明人： Marcus Silva ,  Martin Roetteler

IPC分类号： G01R35/00 ,  G01R29/26

CPC分类号： B82Y10/00 ,  G06N99/002

摘要： A system and method for characterizing noise in a quantum system includes determining pulse sequences for unitary twirling operations. Twirling processes are applied to a quantum system to calibrate errors and to determine channel parameters. Noise characteristics are determined from calibration data collected to calibrate the errors and to determine the channel parameters. The noise characteristics are characterized to determine if the noise is independent relaxation of qubits or collective relaxation of qubits.

摘要翻译： 用于表征量子系统中的噪声的系统和方法包括确定用于单次旋转操作的脉冲序列。 旋转过程应用于量子系统以校准误差并确定通道参数。 噪声特性根据收集的校准数据确定，以校准误差并确定通道参数。 噪声特征的特征在于确定噪声是否是量子位的独立松弛或量子位的集体松弛。

公开(公告)号：US20100094796A1

公开(公告)日：2010-04-15

申请号：US12371941

申请日：2009-02-17

申请人： Martin ROETTELER

发明人： Martin ROETTELER

IPC分类号： G06N7/02

CPC分类号： G06N99/002 ,  B82Y10/00

摘要： Apparatus and methods are disclosed for performing quantum state tomography from the statistics of a collection of measurements, each of which has only two possible outcomes and has the feature of being a measurement of a single qubit. By carefully choosing the measurements it becomes possible to infer the state of a quantum system from the statistics. Moreover, the function which computes the state from the measurement statistics can be computed efficiently in the dimension of the underlying system. It is also possible to explicitly construct such yes/no measurements for all dimensions in which a (+1/−1 valued) Hadamard matrix exists.

摘要翻译： 公开了用于根据测量集合的统计量执行量子态层析成像的装置和方法，每个测量集合仅具有两个可能的结果，并且具有作为单个量子位的测量的特征。 通过仔细选择测量，可以从统计学中推断量子系统的状态。 此外，可以在基础系统的维度中有效地计算从测量统计量计算状态的函数。 对于其中存在（+ 1 / -1值）Hadamard矩阵的所有维度，也可以明确地构造这样的“是/否”测量。

公开(公告)号：US08892857B2

公开(公告)日：2014-11-18

申请号：US13362628

申请日：2012-01-31

申请人： Maris Ozols ,  Martin Roetteler ,  Jérémie Roland

发明人： Maris Ozols ,  Martin Roetteler ,  Jérémie Roland

IPC分类号： G06F15/177 ,  G06N99/00 ,  B82Y10/00

CPC分类号： G06N99/002 ,  B82Y10/00

摘要： Systems and methods for transforming an initial quantum state to a target quantum state are disclosed. The initial quantum state is denoted by superposed initial quantum sample states and the target quantum state is denoted by superposed target quantum sample states. The initial quantum state is initialized with a set of primary registers for the initial quantum state and with at least one ancillary register. The initial quantum state is transformed such that the set of primary registers reflects the initial quantum sample states and the at least one ancillary register is varied to compose an intermediate quantum state. In addition, the intermediate quantum state is amplified by implementing quantum state rotations in accordance with a plurality of reflections on the intermediate quantum state such that the reflections result in the target quantum sample states of the target quantum state with a discarding of the at least one ancillary register.

摘要翻译： 公开了将初始量子态转换成目标量子态的系统和方法。 初始量子态由叠加的初始量子样本状态表示，并且目标量子态由叠加的目标量子样本状态表示。 初始量子态由初始量子态的一组初级寄存器和至少一个辅助寄存器初始化。 变换初始量子态使得初级寄存器的集合反映了初始量子样本状态，并且至少一个辅助寄存器被改变以构成中间量子态。 此外，通过根据中间量子态上的多个反射实施量子态旋转来放大中间量子态，使得反射导致目标量子态的目标量子样本状态，并丢弃至少一个 辅助登记

公开(公告)号：US08485427B2

公开(公告)日：2013-07-16

申请号：US12904234

申请日：2010-10-14

申请人： Dmitry Gavinsky ,  Martin Roetteler

发明人： Dmitry Gavinsky ,  Martin Roetteler

IPC分类号： G06F17/00

CPC分类号： G06Q10/06312

摘要： A quantum mechanical credit unit includes a plurality of qubit strings stored in computer readable storage media and configured for comparison with challenge questions during a verification procedure. The plurality of qubit strings is stored in at least k registers where k is a selected security number for the credit unit. An information register stores information about qubit strings that remain unused to provide the used qubit strings during the verification procedure. A unique serial number is configured to identify the credit unit without association with its holder or the qubit strings. Issuance and verification methods for the credit unit are also disclosed.

摘要翻译： 量子机械信用单元包括存储在计算机可读存储介质中的多个量子位串，并且被配置为在验证过程期间与挑战问题进行比较。 多个量子比特串被存储在至少k个寄存器中，其中k是信用单元的选定的安全号码。 信息寄存器存储有关量子位字符串的信息，该字符串在验证过程中未被使用以提供使用的量子位字符串。 配置唯一的序列号以识别信用单位，而不与其持有人或量子位字符串相关联。 还披露了信用单位的发行和核实方法。

公开(公告)号：US20120091193A1

公开(公告)日：2012-04-19

申请号：US12904234

申请日：2010-10-14

申请人： Dmitry Gavinsky ,  Martin Roetteler

发明人： Dmitry Gavinsky ,  Martin Roetteler

IPC分类号： G06K19/06 ,  G06K5/00

CPC分类号： G06Q10/06312

摘要： A quantum mechanical credit unit includes a plurality of qubit strings stored in computer readable storage media and configured for comparison with challenge questions during a verification procedure. The plurality of qubit strings is stored in at least k registers where k is a selected security number for the credit unit. An information register stores information about qubit strings that remain unused to provide the used qubit strings during the verification procedure. A unique serial number is configured to identify the credit unit without association with its holder or the qubit strings. Issuance and verification methods for the credit unit are also disclosed.

摘要翻译： 量子机械信用单元包括存储在计算机可读存储介质中的多个量子位串，并且被配置为在验证过程期间与挑战问题进行比较。 多个量子比特串被存储在至少k个寄存器中，其中k是信用单元的选定的安全号码。 信息寄存器存储有关量子位字符串的信息，该字符串在验证过程中未被使用以提供使用的量子位字符串。 配置唯一的序列号以识别信用单位，而不与其持有人或量子位字符串相关联。 还披露了信用单位的发行和核实方法。

公开(公告)号：US08219871B2

公开(公告)日：2012-07-10

申请号：US12050566

申请日：2008-03-18

申请人： Martin Roetteler

发明人： Martin Roetteler

IPC分类号： H03M13/00

CPC分类号： H03M13/1191 ,  H03M13/19

摘要： A system and method for dynamical decoupling of a quantum system includes forming a graph including elements to account for decoupling sequence effects represented as nodes in the graph and soft pulses applied being represented as edges in the graph. Sequences which visit edges and nodes in the graph are provided. Binary strings corresponding to the nodes in a coordinate system are mapped using a fixed linear error correcting code. A decoupling method is provided based upon a matrix formed using the error correcting code to determine features of the soft pulses to decouple environmental effects from the quantum system.

摘要翻译： 用于量子系统的动态解耦的系统和方法包括形成包括元素的图，以考虑表示为图中的节点的解耦序列效应，并且所施加的软脉冲被表示为图中的边。 提供访问图形中边缘和节点的顺序。 使用固定的线性纠错码映射与坐标系中的节点对应的二进制字符串。 基于使用纠错码形成的矩阵来提供解耦方法，以确定软脉冲的特征以使环境效应与量子系统解耦。

公开(公告)号：US20110182428A1

公开(公告)日：2011-07-28

申请号：US12846915

申请日：2010-07-30

申请人： Yi Zhao ,  Martin Roetteler ,  Lei Xu ,  Ting Wang

发明人： Yi Zhao ,  Martin Roetteler ,  Lei Xu ,  Ting Wang

IPC分类号： H04K1/00

CPC分类号： H04L9/0852

摘要： Systems and methods to communicate securely includes communicating quantum encryption data on a first wavelength-division multiplexing passive optical network (WDM-PON); and communicating data over separate classical channels of a second WDM-PON, wherein the second WDM-PON synchronizes with the first WDM-PON while providing data communication over the classical channels.

摘要翻译： 用于安全通信的系统和方法包括在第一波分复用无源光网络（WDM-PON）上传送量子加密数据; 以及在第二WDM-PON的单独的经典信道上传送数据，其中所述第二WDM-PON与所述第一WDM-PON同步，同时在经典信道上提供数据通信。