公开(公告)号：US09015215B2

公开(公告)日：2015-04-21

申请号：US12991888

申请日：2009-05-19

申请人： Andrew J. Berkley ,  Richard G. Harris ,  Mohammad Amin

发明人： Andrew J. Berkley ,  Richard G. Harris ,  Mohammad Amin

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

CPC分类号： B82Y10/00 ,  G06N99/002 ,  Y10S505/846

摘要： Quantum annealing may include applying and gradually removing disorder terms to qubits of a quantum processor, for example superconducting flux qubits of a superconducting quantum processor. A problem Hamiltonian may be established by applying control signals to the qubits, an evolution Hamiltonian established by applying disorder terms, and annealing by gradually removing the disorder terms. Change in persistent current in the qubits may be compensated. Multipliers may mediate coupling between various qubits and a global signal line, for example by applying respective scaling factors. Two global signal lines may be arranged in an interdigitated pattern to couple to respective qubits of a communicatively coupled pair of qubits. Pairs of qubits may be communicatively isolated and used to measure a response of one another to defined signals.

摘要翻译： 量子退火可以包括应用并逐渐去除量子处理器的量子位的无序项，例如超导量子处理器的超导通量量子位。 可以通过对量子位应用控制信号来建立哈密尔顿算子，通过应用无序项建立的演化哈密尔顿算子，并逐渐消除无序项进行退火。 量子位中持续电流的变化可能会得到补偿。 乘法器可以介导各种量子位与全局信号线之间的耦合，例如通过应用各自的缩放因子。 两个全局信号线可以以交叉形式布置以耦合到通信耦合的一对量子位的相应量子位。 量子位对可以通信隔离并用于测量彼此对定义的信号的响应。

公开(公告)号：US08560470B2

公开(公告)日：2013-10-15

申请号：US13529664

申请日：2012-06-21

申请人： Mohammad Amin ,  Vicky Choi ,  Andrew J. Berkley

发明人： Mohammad Amin ,  Vicky Choi ,  Andrew J. Berkley

IPC分类号： G06F15/18

CPC分类号： G06N99/002 ,  B82Y10/00

摘要： Various adaptations to adiabatic quantum computation and quantum annealing are described. These adaptations generally involve tailoring an initial Hamiltonian so that a local minimum is avoided when a quantum processor is evolved from the initial Hamiltonian to a problem Hamiltonian. The initial Hamiltonian may represent a mixed Hamiltonian that includes both diagonal and off-diagonal terms, where the diagonal terms at least partially define a center point of a first computation space that is at least partially contained within a second computation space. A problem Hamiltonian may be evolved into a low energy state by inhomogeneously inducing disorder in the qubits of the quantum processor. A higher degree of disorder may be induced in a subset of qubits predicted to contribute to a local minimum of the problem Hamiltonian.

摘要翻译： 描述了绝热量子计算和量子退火的各种适应。 这些调整通常涉及定制初始哈密尔顿算子，以便当量子处理器从初始哈密尔顿算子演化为问题哈密尔顿算子时避免局部最小值。 初始哈密尔顿算子可以表示包括对角线和非对角线项的混合哈密尔顿算子，其中对角项至少部分地限定第一计算空间的中心点，其至少部分地包含在第二计算空间内。 哈密​​尔顿算子可能通过在量子处理器的量子位中不均匀地引起异常而演变为低能态。 可能在被预测为有助于局部最小问题的哈密顿量的量子位的子集中诱发更高程度的紊乱。

公开(公告)号：US20120265718A1

公开(公告)日：2012-10-18

申请号：US13529664

申请日：2012-06-21

申请人： Mohammad Amin ,  Vicky Choi ,  Andrew J. Berkley

发明人： Mohammad Amin ,  Vicky Choi ,  Andrew J. Berkley

IPC分类号： G06F15/18

CPC分类号： G06N99/002 ,  B82Y10/00

摘要： Various adaptations to adiabatic quantum computation and quantum annealing are described. These adaptations generally involve tailoring an initial Hamiltonian so that a local minimum is avoided when a quantum processor is evolved from the initial Hamiltonian to a problem Hamiltonian. The initial Hamiltonian may represent a mixed Hamiltonian that includes both diagonal and off-diagonal terms, where the diagonal terms at least partially define a center point of a first computation space that is at least partially contained within a second computation space. A problem Hamiltonian may be evolved into a low energy state by inhomogeneously inducing disorder in the qubits of the quantum processor. A higher degree of disorder may be induced in a subset of qubits predicted to contribute to a local minimum of the problem Hamiltonian.

摘要翻译： 描述了绝热量子计算和量子退火的各种适应。 这些调整通常涉及定制初始哈密尔顿算子，以便当量子处理器从初始哈密尔顿算子演化为问题哈密尔顿算子时避免局部最小值。 初始哈密尔顿算子可以表示包括对角线和非对角线项的混合哈密尔顿算子，其中对角项至少部分地限定第一计算空间的中心点，其至少部分地包含在第二计算空间内。 哈密​​尔顿算子可能通过在量子处理器的量子位中不均匀地引起异常而演变为低能态。 可能在被预测为有助于局部最小问题的哈密顿量的量子位的子集中诱发更高程度的紊乱。

公开(公告)号：US08102185B2

公开(公告)日：2012-01-24

申请号：US12242133

申请日：2008-09-30

申请人： Jan Johansson ,  Andrew J. Berkley

发明人： Jan Johansson ,  Andrew J. Berkley

IPC分类号： H01L39/22 ,  H03K19/195

CPC分类号： G06N99/002 ,  B82Y10/00

摘要： A transverse coupling system may include a first qubit, a second qubit, a first conductive path capacitively connecting the first qubit and the second qubit, a second conductive path connecting the first qubit and the second qubit, and a dc SQUID connecting the first and the second conductive paths wherein the compound junction loop is threaded by an amount of magnetic flux.

摘要翻译： 横向耦合系统可以包括第一量子比特，第二量子比特，电容性地连接第一量子位和第二量子位的第一导电路径，连接第一量子位和第二量子位的第二导电路径，以及连接第一和第二量子位的直流SQUID 第二导电路径，其中复合连接环被一定量的磁通量穿过。

公开(公告)号：US20110175061A1

公开(公告)日：2011-07-21

申请号：US12944518

申请日：2010-11-11

申请人： Andrew J. Berkley ,  Mark W. Johnson ,  Paul I. Bunyk

发明人： Andrew J. Berkley ,  Mark W. Johnson ,  Paul I. Bunyk

IPC分类号： H01L39/22

CPC分类号： G06N99/002 ,  B82Y10/00 ,  H01L23/53285 ,  H01L27/18 ,  H01L2924/0002 ,  H01L2924/00

摘要： A superconducting integrated circuit may include a magnetic flux transformer having an inner inductive coupling element and an outer inductive coupling element that surrounds the inner inductive coupling element along at least a portion of a length thereof. The magnetic flux transformer may have a coaxial-like geometry such that a mutual inductance between the first inductive coupling element and the second inductive coupling element is sub-linearly proportional to a distance that separates the first inner inductive coupling element from the first outer inductive coupling element. At least one of the first inductive coupling element and the second inductive coupling element may be coupled to a superconducting programmable device, such as a superconducting qubit.

摘要翻译： 超导集成电路可以包括具有内部感应耦合元件和外部感应耦合元件的磁通量变换器，该外部感应耦合元件沿其长度的至少一部分围绕内部感应耦合元件。 磁通变压器可以具有类似同轴的几何形状，使得第一感应耦合元件和第二感应耦合元件之间的互感与将第一内部感应耦合元件与第一外部电感耦合器分开的距离成亚线性比例 元件。 第一电感耦合元件和第二电感耦合元件中的至少一个可以耦合到超导可编程器件，例如超导量子位。

公开(公告)号：US07898282B2

公开(公告)日：2011-03-01

申请号：US12618554

申请日：2009-11-13

申请人： Richard G. Harris ,  Andrew J. Berkley

发明人： Richard G. Harris ,  Andrew J. Berkley

IPC分类号： H03K19/195

CPC分类号： G06N99/002 ,  B82Y10/00

摘要： A system for communicably coupling between two superconducting qubits may include an rf-SQUID coupler having a loop of superconducting material interrupted by a compound Josephson junction and a first magnetic flux inductor configured to controllably couple to the compound Josephson junction. The loop of superconducting material may be positioned with respect to a first qubit and a second qubit to provide respective mutual inductance coupling therebetween. The coupling system may be configured to provide ferromagnetic coupling, anti-ferromagnetic coupling, and/or zero coupling between the first and second qubits. The rf-SQUID coupler may be configured such that there is about zero persistent current circulating in the loop of superconducting material during operation.

摘要翻译： 用于两个超导量子位之间可通信耦合的系统可以包括具有被复合约瑟夫逊结中断的超导材料环的rf-SQUID耦合器和被配置为可控地耦合到复合约瑟夫逊结的第一磁通电感器。 超导材料的环可以相对于第一量子位和第二量子位定位，以在它们之间提供相互的互感耦合。 耦合系统可以被配置为在第一和第二量子位之间提供铁磁耦合，反铁磁耦合和/或零耦合。 rf-SQUID耦合器可以被配置为使得在操作期间在超导材料的环路中循环的约零持续电流。

公开(公告)号：US07639035B2

公开(公告)日：2009-12-29

申请号：US11411051

申请日：2006-04-25

申请人： Andrew J. Berkley

发明人： Andrew J. Berkley

IPC分类号： H03K19/195

CPC分类号： B82Y10/00 ,  G06N99/002

摘要： Systems and methods for copying the classical state of a source qubit to a target qubit are provided. These techniques may be used to read out the states of an array of qubits.

摘要翻译： 提供了将源量子位的经典状态复制到目标量子位的系统和方法。 这些技术可用于读出量子位阵列的状态。

公开(公告)号：US20130278283A1

公开(公告)日：2013-10-24

申请号：US13808006

申请日：2011-11-10

申请人： Andrew J. Berkley

发明人： Andrew J. Berkley

IPC分类号： H03K19/195

CPC分类号： H03K19/195 ,  B82Y10/00 ,  G06N99/002

摘要： Systems and methods for reading out the states of superconducting flux qubits may couple magnetic flux representative of a qubit state to a DC-SQUID in a variable transformer circuit. The DC-SQUID is electrically coupled in parallel with a primary inductor such that a time-varying (e.g., AC) drive current is divided between the DC-SQUID and the primary inductor in a ratio that is dependent on the qubit state. The primary inductor is inductively coupled to a secondary inductor to provide a time-varying (e.g., AC) output signal indicative of the qubit state without causing the DC-SQUID to switch into a voltage state. Coupling between the superconducting flux qubit and the DC-SQUID may be mediated by a routing system including a plurality of latching qubits. Multiple superconducting flux qubits may be coupled to the same routing system so that a single variable transformer circuit may be used to measure the states of multiple qubits.

摘要翻译： 用于读出超导通量量子位的状态的系统和方法可以将表示量子位状态的磁通量耦合到可变变压器电路中的DC-SQUID。 DC-SQUID与主电感器并联电耦合，使得以取决于量子位状态的比率在DC-SQUID和主电感器之间划分时变（例如，AC）驱动电流。 主电感器感应耦合到次级电感器以提供指示量子位状态的时变（例如，AC）输出信号，而不会使DC-SQUID切换到电压状态。 超导通量量子位与DC-SQUID之间的耦合可以由包括多个锁存量子位的路由系统来介导。 多个超导通量量子位可以耦合到相同的路由系统，使得可以使用单个可变变压器电路来测量多个量子位的状态。

公开(公告)号：US08098179B2

公开(公告)日：2012-01-17

申请号：US12120354

申请日：2008-05-14

申请人： Paul I. Bunyk ,  Felix Maibaum ,  Andrew J. Berkley ,  Thomas Mahon

发明人： Paul I. Bunyk ,  Felix Maibaum ,  Andrew J. Berkley ,  Thomas Mahon

IPC分类号： H03M1/00

CPC分类号： B82Y10/00 ,  G06N99/002 ,  H03M1/66

摘要： A superconducting flux digital-to-analog converter includes a superconducting inductor ladder circuit. The ladder circuit includes a plurality of closed superconducting current paths that each includes at least two superconducting inductors coupled in series to form a respective superconducting loop, successively adjacent or neighboring superconducting loops are connected in parallel with each other and share at least one of the superconducting inductors to form a flux divider network. A data signal input structure provides a respective bit of a multiple bit signal to each of the superconducting loops. The data signal input structure may include a set of superconducting quantum interference devices (SQUIDs). The data signal input structure may include a superconducting shift register, for example a single-flux quantum (SFQ) shift register or a flux-based superconducting shift register comprising a number of latching qubits.

摘要翻译： 超导通量数模转换器包括超导电感梯形电路。 梯形电路包括多个封闭的超导电流路径，每个超导电流路径均包括至少两个串联耦合的超导电感器，以形成相应的超导环路，连续相邻的或相邻的超导环路彼此并联连接并且共享至少一个超导 电感器形成一个分流网络。 数据信号输入结构为每个超导环提供多位信号的相应位。 数据信号输入结构可以包括一组超导量子干涉装置（SQUID）。 数据信号输入结构可以包括超导移位寄存器，例如单通量量子（SFQ）移位寄存器或包括多个锁存量子位的基于磁通的超导移位寄存器。

公开(公告)号：US20110057169A1

公开(公告)日：2011-03-10

申请号：US12991891

申请日：2009-09-03

申请人： Richard G. Harris ,  Andrew J. Berkley ,  Jan Johansson ,  Mark Johnson ,  Mohammad Amin ,  Paul I. Bunyk

发明人： Richard G. Harris ,  Andrew J. Berkley ,  Jan Johansson ,  Mark Johnson ,  Mohammad Amin ,  Paul I. Bunyk

IPC分类号： H01L39/22 ,  B82Y10/00

CPC分类号： H01L39/223 ,  B82Y10/00 ,  G06N99/002 ,  H01L27/18

摘要： Apparatus and methods enable active compensation for unwanted discrepancies in the superconducting elements of quantum processor. A qubit may include a primary compound Josephson junction (CJJ) structure, which may include at least a first secondary CJJ structure to enable compensation for Josephson junction asymmetry in the primary CJJ structure. A qubit may include a series LC-circuit coupled in parallel with a first CJJ structure to provide a tunable capacitance. A qubit control system may include means for tuning inductance of a qubit loop, for instance a tunable coupler inductively coupled to the qubit loop and controlled by a programming interface, or a CJJ structure coupled in series with the qubit loop and controlled by a programming interface.

摘要翻译： 装置和方法能够对量子处理器的超导元件中的有害偏差进行有效补偿。 量子位可以包括主复合约瑟夫逊结（CJJ）结构，其可以包括至少第一次级CJJ结构，以能够补偿主CJJ结构中的约瑟夫逊结不对称性。 量子位可以包括与第一CJJ结构并联耦合以提供可调电容的串联LC电路。 量子位控制系统可以包括用于调整量子位环路的电感的装置，例如感应耦合到量子位循环并由编程接口控制的可调谐耦合器件，或与量子位循环串联耦合并由编程接口控制的CJJ结构 。