公开(公告)号：US20170220510A1

公开(公告)日：2017-08-03

申请号：US15418497

申请日：2017-01-27

Applicant: D-Wave Systems Inc.

Inventor： Jeremy P. Hilton ,  Aidan Patrick Roy ,  Paul I. Bunyk ,  Andrew Douglas King ,  Tomas J. Boothby ,  Richard G. Harris ,  Chunqing Deng

IPC: G06F13/40 ,  G06N99/00 ,  G06F13/36

CPC classification number: G06F13/4068 ,  G06F13/36 ,  G06N99/002

Abstract: Topologies for analog computing systems are provided. Qubits in the topology are grouped into cells, and cells are coupled to adjacent cells by inter-cell couplers. At least some cells are coupled to non-adjacent cells via long-range couplers. Long-range couplers may be arranged into coverings so that certain sets of qubits within a covering region may be coupled with a reduced number of couplers. Each cell within a covering region without a long-range coupler may be proximate to a cell with a long range coupler so that each cell within the covering region is no more than a certain coupling distance away from a long-range coupler. Long-range couplers may couple over a greater physical distance than inter-cell couplers. Long-range couplers may couple to qubits over a larger coupling region, and may extend across multiple crossing regions between qubits.

公开(公告)号：US10268622B2

公开(公告)日：2019-04-23

申请号：US15418497

申请日：2017-01-27

Applicant: D-Wave Systems Inc.

Inventor： Jeremy P. Hilton ,  Aidan Patrick Roy ,  Paul I. Bunyk ,  Andrew Douglas King ,  Kelly T. R. Boothby ,  Richard G. Harris ,  Chunqing Deng

IPC: G06F13/40 ,  G06F13/36 ,  G06N99/00

Abstract: Topologies for analog computing systems are provided. Qubits in the topology are grouped into cells, and cells are coupled to adjacent cells by inter-cell couplers. At least some cells are coupled to non-adjacent cells via long-range couplers. Long-range couplers may be arranged into coverings so that certain sets of qubits within a covering region may be coupled with a reduced number of couplers. Each cell within a covering region without a long-range coupler may be proximate to a cell with a long range coupler so that each cell within the covering region is no more than a certain coupling distance away from a long-range coupler. Long-range couplers may couple over a greater physical distance than inter-cell couplers. Long-range couplers may couple to qubits over a larger coupling region, and may extend across multiple crossing regions between qubits.

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).