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    Quantum processor with instance programmable qubit connectivity
    2.
    发明授权
    Quantum processor with instance programmable qubit connectivity 有权

    公开(公告)号：US09710758B2

    公开(公告)日：2017-07-18

    申请号：US14691268

    申请日：2015-04-20

    Applicant: D-Wave Systems Inc.

    Inventor： Paul I. Bunyk ,  Mohammad H. S. Amin ,  Richard G. Harris ,  Trevor Michael Lanting ,  Mark W. Johnson ,  Jeremy P. Hilton ,  Emile M. Hoskinson

    IPC: G06F15/82 ,  G06N99/00

    CPC classification number: G06N99/002 ,  G06F15/82

    Abstract: In a quantum processor some couplers couple a given qubit to a nearest neighbor qubit (e.g., vertically and horizontally in an ordered 2D array), other couplers couple to next-nearest neighbor qubits (e.g., diagonally in the ordered 2D array). Couplers may include half-couplers, to selectively provide communicative coupling between a given qubit and other qubits, which may or may not be nearest or even next-nearest-neighbors. Tunable couplers selective mediate communicative coupling. A control system may impose a connectivity on a quantum processor, different than an “as designed” or “as manufactured” physical connectivity. Imposition may be via a digital processor processing a working or updated working graph, to map or embed a problem graph. A set of exclude qubits may be created from a comparison of hardware and working graphs. An annealing schedule may adjust a respective normalized inductance of one or more qubits, for instance to exclude certain qubits.

    Analog processor comprising quantum devices
    3.
    发明授权
    Analog processor comprising quantum devices 有权

    公开(公告)号：US11526463B2

    公开(公告)日：2022-12-13

    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 ,  H04L67/12 ,  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.

    Systems and methods for achieving orthogonal control of non-orthogonal qubit parameters
    4.
    发明授权
    Systems and methods for achieving orthogonal control of non-orthogonal qubit parameters 有权

    公开(公告)号：US11836574B2

    公开(公告)日：2023-12-05

    申请号：US17234469

    申请日：2021-04-19

    Applicant: D-WAVE SYSTEMS INC.

    Inventor： Mohammad H. S. Amin ,  Trevor Michael Lanting ,  Colin Enderud

    IPC: G06N10/00

    CPC classification number: G06N10/00

    Abstract: Achieving orthogonal control of non-orthogonal qubit parameters of a logical qubit allows for increasing the length of a qubit chain thereby increasing the effective connectivity of the qubit chain. A hybrid qubit is formed by communicatively coupling a dedicated second qubit to a first qubit. By tuning a programmable parameter of the second qubit of a hybrid qubit, an effective programmable parameter of the hybrid qubit is adjusted without affecting another effective programmable parameter of the hybrid qubit thereby achieving orthogonal control of otherwise non-orthogonal qubit parameters. The length of the logical qubit may thus be increased by communicatively coupling a plurality of such hybrid qubits together.

    Quantum processor with instance programmable qubit connectivity
    5.
    发明授权
    Quantum processor with instance programmable qubit connectivity 有权

    公开(公告)号：US10891554B2

    公开(公告)日：2021-01-12

    申请号：US16258082

    申请日：2019-01-25

    Applicant: D-WAVE SYSTEMS INC.

    Inventor： Richard G. Harris ,  Paul I. Bunyk ,  Mohammad H. S. Amin ,  Emile M. Hoskinson

    IPC: G06N10/00 ,  G06F15/82

    Abstract: In a quantum processor some couplers couple a given qubit to a nearest neighbor qubit (e.g., vertically and horizontally in an ordered 2D array), other couplers couple to next-nearest neighbor qubits (e.g., diagonally in the ordered 2D array). Couplers may include half-couplers, to selectively provide communicative coupling between a given qubit and other qubits, which may or may not be nearest or even next-nearest-neighbors. Tunable couplers selective mediate communicative coupling. A control system may impose a connectivity on a quantum processor, different than an “as designed” or “as manufactured” physical connectivity. Imposition may be via a digital processor processing a working or updated working graph, to map or embed a problem graph. A set of exclude qubits may be created from a comparison of hardware and working graphs. An annealing schedule may adjust a respective normalized inductance of one or more qubits, for instance to exclude certain qubits.

    Universal adiabatic quantum computing with superconducting qubits
    7.
    发明授权
    Universal adiabatic quantum computing with superconducting qubits 有权

    公开(公告)号：US10037493B2

    公开(公告)日：2018-07-31

    申请号：US14520139

    申请日：2014-10-21

    Applicant: D-Wave Systems Inc.

    Inventor： Richard G. Harris ,  Mohammad H. S. Amin ,  Anatoly Smirnov

    IPC: G06F17/00 ,  G06N99/00 ,  H03K3/38 ,  H03K19/195 ,  G11C11/44

    CPC classification number: G06N10/00 ,  G11C11/44 ,  H03K3/38 ,  H03K19/1952

    Abstract: A quantum processor is operable as a universal adiabatic quantum computing system. The quantum processor includes physical qubits, with at least a first and second communicative coupling available between pairs of qubits via an in-situ tunable superconducting capacitive coupler and an in-situ tunable superconducting inductive coupler, respectively. Tunable couplers provide diagonal and off-diagonal coupling. Compound Josephson junctions (CJJs) of the tunable couplers are responsive to a flux bias to tune a sign and magnitude of a sum of a capacitance of a fixed capacitor and a tunable capacitance which is mediated across a pair of coupling capacitors. The qubits may be hybrid qubits, operable in a flux regime or a charge regime. Qubits may include a pair of CJJs that interrupt a loop of material and which are separated by an island of superconducting material which is voltage biased with respect to a qubit body.

    Systems and methods for achieving orthogonal control of non-orthogonal qubit parameters
    8.
    发明授权
    Systems and methods for achieving orthogonal control of non-orthogonal qubit parameters 有权

    公开(公告)号：US09727823B2

    公开(公告)日：2017-08-08

    申请号：US14339289

    申请日：2014-07-23

    Applicant: D-WAVE SYSTEMS INC.

    Inventor： Mohammad H. S. Amin ,  Trevor Michael Lanting ,  Colin Enderud

    IPC: G06F15/00 ,  G06F15/18 ,  G06N99/00

    CPC classification number: G06N99/002

    Abstract: Achieving orthogonal control of non-orthogonal qubit parameters of a logical qubit allows for increasing the length of a qubit chain thereby increasing the effective connectivity of the qubit chain. A hybrid qubit is formed by communicatively coupling a dedicated second qubit to a first qubit. By tuning a programmable parameter of the second qubit of a hybrid qubit, an effective programmable parameter of the hybrid qubit is adjusted without affecting another effective programmable parameter of the hybrid qubit thereby achieving orthogonal control of otherwise non-orthogonal qubit parameters. The length of the logical qubit may thus be increased by communicatively coupling a plurality of such hybrid qubits together.

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