公开(公告)号：US11797874B2

公开(公告)日：2023-10-24

申请号：US17387654

申请日：2021-07-28

Applicant: D-WAVE SYSTEMS INC.

Inventor： Paul I. Bunyk ,  James King ,  Murray C. Thom ,  Mohammad H. Amin ,  Anatoly Smirnov ,  Sheir Yarkoni ,  Trevor M. Lanting ,  Andrew D. King ,  Kelly T. R. Boothby

IPC: G06N10/00 ,  G06F11/07

CPC classification number: G06N10/00 ,  G06F11/0736 ,  G06F11/0751 ,  G06F11/0793

Abstract: The systems, devices, articles, and methods described herein generally relate to analog computers, for example quantum processors comprising qubits, couplers, and, or cavities. Analog computers, for example quantum processor based computers, are the subject of various sources of error which can hinder operation, potentially reducing computational accuracy and speed. Sources of error can be broadly characterized, for example as i) a background susceptibility do to inherently characteristics of the circuitry design, ii) as an h/J ratio imbalance, iii) bit flip errors, iv) fidelity, and v) Anderson localization, and various combinations of the aforesaid.

公开(公告)号：US20180314970A1

公开(公告)日：2018-11-01

申请号：US16029040

申请日：2018-07-06

Applicant: D-Wave Systems Inc.

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

IPC: G06N99/00 ,  H03K19/195

CPC classification number: G06N99/002 ,  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.

公开(公告)号：US20150111754A1

公开(公告)日：2015-04-23

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: G06N99/00 ,  G11C11/44

CPC classification number: G06N99/002 ,  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.

Abstract translation: 量子处理器可用作通用绝热量子计算系统。 量子处理器包括物理量子位，其中至少第一和第二通信耦合分别通过原位可调谐超导电容耦合器和原位可调谐超导感应耦合器在成对的量子位之间可用。 可调谐耦合器提供对角线和非对角线耦合。 可调谐耦合器的复合约瑟夫逊结（CJJ）响应于通量偏置来调节固定电容器的电容和在一对耦合电容器之间介导的可调谐电容之和的符号和幅度。 量子位可以是混合量子位，可在通量状态或电荷状态下操作。 Qubits可以包括一对中断材料环的CJJ，它们被相对于量子位体电压偏置的超导材料岛隔开。

公开(公告)号：US11494683B2

公开(公告)日：2022-11-08

申请号：US16955526

申请日：2018-12-19

Applicant: D-Wave Systems Inc.

Inventor： Mohammad H. Amin ,  Paul I. Bunyk ,  Trevor M. Lanting ,  Chunqing Deng ,  Anatoly Smirnov ,  Kelly T. R. Boothby ,  Emile M. Hoskinson ,  Christopher B. Rich

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

Abstract: Josephson junctions (JJ) may replace primary inductance of transformers to realize galvanic coupling between qubits, advantageously reducing size. A long-range symmetric coupler may include a compound JJ (CJJ) positioned at least approximately at a half-way point along the coupler to advantageously provide a higher energy of a first excited state than that of an asymmetric long-range coupler. Quantum processors may include qubits and couplers with a non-stoquastic Hamiltonian to enhance multi-qubit tunneling during annealing. Qubits may include additional shunt capacitances, e.g., to increase overall quality of a total capacitance and improve quantum coherence. A sign and/or magnitude of an effective tunneling amplitude Δeff of a qubit characterized by a double-well potential energy may advantageously be tuned. Sign-tunable electrostatic coupling of qubits may be implemented, e.g., via resonators, and LC-circuits. YY couplings may be incorporated into a quantum anneaier (e.g., quantum processor).

公开(公告)号：US20220019929A1

公开(公告)日：2022-01-20

申请号：US17387654

申请日：2021-07-28

Applicant: D-WAVE SYSTEMS INC.

Inventor： Paul I. Bunyk ,  James King ,  Murray C. Thom ,  Mohammad H. Amin ,  Anatoly Smirnov ,  Sheir Yarkoni ,  Trevor M. Lanting ,  Andrew D. King ,  Kelly T. R. Boothby

IPC: G06N10/00 ,  G06F11/07

Abstract: The systems, devices, articles, and methods described herein generally relate to analog computers, for example quantum processors comprising qubits, couplers, and, or cavities. Analog computers, for example quantum processor based computers, are the subject of various sources of error which can hinder operation, potentially reducing computational accuracy and speed. Sources of error can be broadly characterized, for example as i) a background susceptibility do to inherently characteristics of the circuitry design, ii) as an h/J ratio imbalance, iii) bit flip errors, iv) fidelity, and v) Anderson localization, and various combinations of the aforesaid.

公开(公告)号：US11348024B2

公开(公告)日：2022-05-31

申请号：US16029040

申请日：2018-07-06

Applicant: D-WAVE SYSTEMS INC.

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

IPC: G06N10/00 ,  H03K3/38 ,  H03K19/195 ,  G11C11/44

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.

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.