公开(公告)号：US20150379418A1

公开(公告)日：2015-12-31

申请号：US14846334

申请日：2015-09-04

Applicant: D-Wave Systems Inc.

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

IPC: G06N99/00 ,  H01L27/18 ,  H01L39/22

CPC classification number: H01L39/223 ,  B82Y10/00 ,  G06N99/002 ,  H01L27/18

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.

Abstract translation: 装置和方法使得能够对量子处理器的超导元件中的不期望的差异进行主动补偿。 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 。

公开(公告)号：US20150346291A1

公开(公告)日：2015-12-03

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: G01R33/035 ,  G01R33/00

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：US11561269B2

公开(公告)日：2023-01-24

申请号：US17388545

申请日：2021-07-29

Applicant: D-WAVE SYSTEMS INC.

Inventor： Loren J. Swenson ,  Andrew J. Berkley ,  Mark H. Volkmann ,  George E. G. Sterling ,  Jed D. Whittaker

IPC: G01R33/035 ,  H01L39/22 ,  G06N10/00

Abstract: A device is dynamically isolated via a broadband switch that includes a plurality of cascade elements in series, wherein each cascade element comprises a first set of SQUIDs in series, a matching capacitor, and a second set of SQUIDs in series. The broadband switch is set to a passing state via flux bias lines during programming and readout of the device and set to a suppression state during device's calculation to reduce operation errors at the device. A device is electrically isolated from high-frequencies via an unbiased broadband switch. A device is coupled to a tunable thermal bath that includes a broadband switch.

公开(公告)号：US20220020913A1

公开(公告)日：2022-01-20

申请号：US17330037

申请日：2021-05-25

Applicant: D-Wave Systems Inc. (a British Columbia company)

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

IPC: H01L39/22 ,  G06N10/00 ,  B82Y10/00 ,  H01L27/18

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：US20210374590A1

公开(公告)日：2021-12-02

申请号：US17113847

申请日：2020-12-07

Applicant: D-WAVE SYSTEMS INC.

Inventor： Jacob Daniel Biamonte ,  Andrew J. Berkley ,  Mohammad H.S. Amin

IPC: G06N10/00 ,  B82Y10/00

Abstract: Devices, methods and articles advantageously allow communications between qubits to provide an architecture for universal adiabatic quantum computation. The architecture includes a first coupled basis A1B1 and a second coupled basis A2B2 that does not commute with the first basis A1B1.

公开(公告)号：US11182230B2

公开(公告)日：2021-11-23

申请号：US16702096

申请日：2019-12-03

Applicant: D-WAVE SYSTEMS INC.

Inventor： Andrew J. Berkley ,  Richard G. Harris

IPC: G06F11/00

Abstract: Methods for reducing errors in calibrated devices comprise detecting outliers, self-checking consistency of measurements, tuning device controls to target values, and absolutely calibrating devices via a first standard and cross-checking the results via a second standard. The first standard may be a calibrated current and the second calibration standard may be a calibrated frequency. A calibrated frequency may be a microwave signal applied to the body of a qubit. Qubit annealing controls can quickly lower and raise the tunnel barrier to measures the oscillation frequency of the qubit between two potential wells.

公开(公告)号：US20210342289A1

公开(公告)日：2021-11-04

申请号：US17355458

申请日：2021-06-23

Applicant: D-WAVE SYSTEMS INC.

Inventor： Alexander Maassen van den Brink ,  Peter Love ,  Mohammad H.S. Amin ,  Geordie Rose ,  David Grant ,  Miles F.H. Steininger ,  Paul I. Bunyk ,  Andrew J. Berkley

IPC: G06F15/80 ,  H03K3/38 ,  H04L29/08 ,  G06N10/00 ,  G06F15/76

Abstract: Analog processors for solving various computational problems are provided. Such analog processors comprise a plurality of quantum devices, arranged in a lattice, together with a plurality of coupling devices. The analog processors further comprise bias control systems each configured to apply a local effective bias on a corresponding quantum device. A set of coupling devices in the plurality of coupling devices is configured to couple nearest-neighbor quantum devices in the lattice. Another set of coupling devices is configured to couple next-nearest neighbor quantum devices. The analog processors further comprise a plurality of coupling control systems each configured to tune the coupling value of a corresponding coupling device in the plurality of coupling devices to a coupling. Such quantum processors further comprise a set of readout devices each configured to measure the information from a corresponding quantum device in the plurality of quantum devices.

公开(公告)号：US11093440B2

公开(公告)日：2021-08-17

申请号：US16859672

申请日：2020-04-27

Applicant: D-WAVE SYSTEMS INC.

Inventor： Alexander Maassen van den Brink ,  Peter Love ,  Mohammad H. S. Amin ,  Geordie Rose ,  David Grant ,  Miles F. H. Steininger ,  Paul I. Bunyk ,  Andrew J. Berkley

IPC: G06F15/80 ,  H03K3/38 ,  H04L29/08 ,  G06N10/00 ,  G06F15/76 ,  B82Y10/00

Abstract: Analog processors for solving various computational problems are provided. Such analog processors comprise a plurality of quantum devices, arranged in a lattice, together with a plurality of coupling devices. The analog processors further comprise bias control systems each configured to apply a local effective bias on a corresponding quantum device. A set of coupling devices in the plurality of coupling devices is configured to couple nearest-neighbor quantum devices in the lattice. Another set of coupling devices is configured to couple next-nearest neighbor quantum devices. The analog processors further comprise a plurality of coupling control systems each configured to tune the coupling value of a corresponding coupling device in the plurality of coupling devices to a coupling. Such quantum processors further comprise a set of readout devices each configured to measure the information from a corresponding quantum device in the plurality of quantum devices.

公开(公告)号：US20210013391A1

公开(公告)日：2021-01-14

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: H01L39/22 ,  G06N10/00 ,  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：US20200183768A1

公开(公告)日：2020-06-11

申请号：US16702096

申请日：2019-12-03

Applicant: D-WAVE SYSTEMS INC.

Inventor： Andrew J. Berkley ,  Richard G. Harris

IPC: G06F11/00 ,  G06N10/00

Abstract: Methods for reducing errors in calibrated devices comprise detecting outliers, self-checking consistency of measurements, tuning device controls to target values, and absolutely calibrating devices via a first standard and cross-checking the results via a second standard. The first standard may be a calibrated current and the second calibration standard may be a calibrated frequency. A calibrated frequency may be a microwave signal applied to the body of a qubit. Qubit annealing controls can quickly lower and raise the tunnel barrier to measures the oscillation frequency of the qubit between two potential wells.