公开(公告)号：US20160132785A1

公开(公告)日：2016-05-12

申请号：US14896259

申请日：2013-10-22

Applicant: Mohammad H.S. AMIN ,  Richard G. HARRIS ,  Trevor Michael LANTING ,  Anatoly Yu SMIRNOV ,  D-Wave Systems Inc.

Inventor： Mohammad H.S. Amin ,  Andrew J. Berkley ,  Richard G. Harris ,  Trevor Michael Lanting ,  Anatoly Yu Smirnov

IPC: G06N99/00 ,  G06F15/82

CPC classification number: G06N99/002 ,  G06F15/82

Abstract: Systems and methods for employing macroscopic resonant tunneling operations in quantum processors are described. New modes of use for quantum processor architectures employ probe qubits to determine energy eigenvalues of a problem Hamiltonian through macroscopic resonant tunneling operations. A dedicated probe qubit design that may be added to quantum processor architectures is also described. The dedicated probe qubit enables improved performance of macroscopic resonant tunneling operations and, consequently, improved performance of the new modes of use described.

Abstract translation: 描述了在量子处理器中采用宏观共振隧穿操作的系统和方法。 量子处理器架构的新的使用模式使用探针量子位来通过宏观谐振隧穿操作来确定问题哈密顿量的能量特征值。 还描述了可以添加到量子处理器架构的专用探针量子比特设计。 专用探头量子比特可以改善宏观谐振隧穿操作的性能，从而提高上述新型使用方式的性能。

公开(公告)号：US09335385B2

公开(公告)日：2016-05-10

申请号：US14462200

申请日：2014-08-18

Applicant: D-Wave Systems Inc.

Inventor： Trevor Michael Lanting ,  Paul I. Bunyk ,  Andrew J. Berkley ,  Richard G. Harris ,  Sergey V. Uchaykin ,  Andrew Brock Wilson ,  Mark Johnson

IPC: G01R33/00 ,  G01R33/035

CPC classification number: G01R33/0354 ,  G01R33/0017 ,  G01R33/0094

Abstract: SQUIDs may detect local magnetic fields. SQUIDS of varying sizes, and hence sensitivities may detect different magnitudes of magnetic fields. SQUIDs may be oriented to detect magnetic fields in a variety of orientations, for example along an orthogonal reference frame of a chip or wafer. The SQUIDS may be formed or carried on the same chip or wafer as a superconducting processor (e.g., a superconducting quantum processor). Measurement of magnetic fields may permit compensation, for example allowing tuning of a compensation field via a compensation coil and/or a heater to warm select portions of a system. A SQIF may be implemented as a SQUID employing an unconventional grating structure. Successful fabrication of an operable SQIF may be facilitated by incorporating multiple Josephson junctions in series in each arm of the unconventional grating structure.

Abstract translation: SQUID可以检测局部磁场。 具有不同尺寸的SQUIDS，因此灵敏度可以检测不同的磁场强度。 SQUID可以被定向以检测各种取向中的磁场，例如沿着芯片或晶片的正交参考系。 SQUIDS可以与超导处理器（例如超导量子处理器）形成或携带在相同的芯片或晶片上。 磁场的测量可以允许补偿，例如允许通过补偿线圈和/或加热器对补偿场进行调谐以温暖系统的选择部分。 SQIF可以被实现为采用非常规光栅结构的SQUID。 可以通过将多个约瑟夫逊结串联在非常规光栅结构的每个臂中来促进可操作的SQIF的成功制造。

公开(公告)号：US12224750B2

公开(公告)日：2025-02-11

申请号：US17883874

申请日：2022-08-09

Applicant: D-WAVE SYSTEMS INC.

Inventor： Mohammad H. Amin ,  Richard G. Harris

IPC: H03K19/195 ,  G06N10/40

Abstract: A logical qubit, a quantum processor, and a method of performing an operation on the logical qubit are discussed. The logical qubit includes first and second tunable couplers and a plurality of fixed couplers, with at least one fixed coupler providing four physical qubit interaction. The first and second tunable couplers and the fixed couplers enforce even parity in any connected qubits. The logical qubit has a plurality of physical qubits with qubits connected to the first tunable coupler and a first fixed coupler, qubits connected to the second tunable coupler and a second fixed coupler, and qubits connected between the first fixed coupler and the second fixed coupler. Each fixed coupler is connected to at least two physical qubits and at least two paths connect the first tunable coupler and the second tunable coupler, with one path communicating with a microwave line.

公开(公告)号：US12035640B2

公开(公告)日：2024-07-09

申请号：US17330037

申请日：2021-05-25

Applicant: D-WAVE SYSTEMS INC.

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

IPC: H10N60/12 ,  B82Y10/00 ,  G06N10/40 ,  G06N10/70 ,  H03K19/195 ,  H10N69/00

CPC classification number: H10N60/12 ,  B82Y10/00 ,  G06N10/40 ,  G06N10/70 ,  H03K19/195 ,  H03K19/1954 ,  H10N69/00

Abstract: Apparatus and methods enable active compensation for unwanted discrepancies in the superconducting elements of a 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.

公开(公告)号：US11593695B2

公开(公告)日：2023-02-28

申请号：US16830650

申请日：2020-03-26

Applicant: D-WAVE SYSTEMS INC.

Inventor： William W. Bernoudy ,  Mohammad H. Amin ,  James A. King ,  Jeremy P. Hilton ,  Richard G. Harris ,  Andrew J. Berkley ,  Kelly T. R. Boothby

IPC: G06F17/00 ,  G06N10/00 ,  G06N10/60 ,  G06F15/16 ,  G06F17/10 ,  G06N10/40 ,  H03K19/00

Abstract: A hybrid computing system for solving a computational problem includes a digital processor, a quantum processor having qubits and coupling devices that together define a working graph of the quantum processor, and at least one nontransitory processor-readable medium communicatively coupleable to the digital processor which stores at least one of processor-executable instructions or data. The digital processor receives a computational problem, and programs the quantum processor with a first set of bias fields and a first set of coupling strengths. The quantum processor generates samples as potential solutions to an approximation of the problem. The digital processor updates the approximation by determining a second set of bias fields based at least in part on the first set of bias fields and a first set of mean fields that are based at least in part on the first set of samples and coupling strengths of one or more virtual coupling devices.

公开(公告)号：US20230004851A1

公开(公告)日：2023-01-05

申请号：US17782261

申请日：2020-12-03

Applicant: D-WAVE SYSTEMS INC.

Inventor： Richard G. Harris ,  Christopher B. Rich

IPC: G06N10/40 ,  H01L39/02 ,  H01L39/24

Abstract: A system and method for mitigating flux trapping in a superconducting integrated circuit. A first metal layer is formed having a first critical temperature and a first device, and a flux directing layer is formed having a second critical temperature. The flux directing layer is positioned in communication with an aperture location, and the aperture location is spaced from the first device to isolate the first device from flux trapped in the aperture. The superconducting integrated circuit is cooled from a first temperature that is above both the first and second critical temperatures to a second temperature that is less than both the first and second critical temperatures by a cryogenic refrigerator. A relative temperature difference between the first and second critical temperatures causes the flux directing layer to direct flux away from the first device and trap flux at the aperture location.

公开(公告)号：US11127893B2

公开(公告)日：2021-09-21

申请号：US16098801

申请日：2017-05-03

Applicant: D-WAVE SYSTEMS INC.

Inventor： Mark W. Johnson ,  Paul I. Bunyk ,  Andrew J. Berkley ,  Richard G. Harris ,  Kelly T. R. Boothby ,  Loren J. Swenson ,  Emile M. Hoskinson ,  Christopher B. Rich ,  Jan E. S. Johansson

IPC: G06N10/00 ,  H01L39/22 ,  H01L39/02

Abstract: Approaches useful to operation of scalable processors with ever larger numbers of logic devices (e.g., qubits) advantageously take advantage of QFPs, for example to implement shift registers, multiplexers (i.e., MUXs), de-multiplexers (i.e., DEMUXs), and permanent magnetic memories (i.e., PMMs), and the like, and/or employ XY or XYZ addressing schemes, and/or employ control lines that extend in a “braided” pattern across an array of devices. Many of these described approaches are particularly suited for implementing input to and/or output from such processors. Superconducting quantum processors comprising superconducting digital-analog converters (DACs) are provided. The DACs may use kinetic inductance to store energy via thin-film superconducting materials and/or series of Josephson junctions, and may use single-loop or multi-loop designs. Particular constructions of energy storage elements are disclosed, including meandering structures. Galvanic connections between DACs and/or with target devices are disclosed, as well as inductive connections.

公开(公告)号：US20200311591A1

公开(公告)日：2020-10-01

申请号：US16830650

申请日：2020-03-26

Applicant: D-WAVE SYSTEMS INC.

Inventor： William W. Bernoudy ,  Mohammad H. Amin ,  James A. King ,  Jeremy P. Hilton ,  Richard G. Harris ,  Andrew J. Berkley ,  Kelly T. R. Boothby

IPC: G06N10/00 ,  G06F17/18

Abstract: A hybrid computing system for solving a computational problem includes a digital processor, a quantum processor having qubits and coupling devices that together define a working graph of the quantum processor, and at least one nontransitory processor-readable medium communicatively coupleable to the digital processor which stores at least one of processor-executable instructions or data. The digital processor receives a computational problem, and programs the quantum processor with a first set of bias fields and a first set of coupling strengths. The quantum processor generates samples as potential solutions to an approximation of the problem. The digital processor updates the approximation by determining a second set of bias fields based at least in part on the first set of bias fields and a first set of mean fields that are based at least in part on the first set of samples and coupling strengths of one or more virtual coupling devices.

公开(公告)号：US10552757B2

公开(公告)日：2020-02-04

申请号：US16057500

申请日：2018-08-07

Applicant: D-Wave Systems Inc.

Inventor： Mohammad H. S. Amin ,  Andrew J. Berkley ,  Richard G. Harris ,  Trevor Michael Lanting ,  Anatoly Yu Smirnov

IPC: G06N10/00 ,  G06F15/82

Abstract: Systems and methods for employing macroscopic resonant tunneling operations in quantum processors are described. New modes of use for quantum processor architectures employ probe qubits to determine energy eigenvalues of a problem Hamiltonian through macroscopic resonant tunneling operations. A dedicated probe qubit design that may be added to quantum processor architectures is also described. The dedicated probe qubit enables improved performance of macroscopic resonant tunneling operations and, consequently, improved performance of the new modes of use described.

公开(公告)号：US10467545B2

公开(公告)日：2019-11-05

申请号：US15752102

申请日：2016-08-11

Applicant: D-Wave Systems Inc.

Inventor： Richard G. Harris

IPC: H01L27/18 ,  G06N10/00 ,  B82Y10/00 ,  H01F38/14 ,  H03K19/195

Abstract: A higher degree of interactions between qubits is realizable. This disclosure generally relates to devices, and architectures for quantum instruments comprising quantum devices and techniques for operating the same. Systems and processors for creating and using higher degree interactions between qubits may be found herein. Higher order interactions include interactions among three or more qubits. Methods for creating and using higher degree interactions among three or more qubits on a quantum processor may be found herein.