公开(公告)号：US20240185104A1

公开(公告)日：2024-06-06

申请号：US18385226

申请日：2023-10-30

Applicant: D-WAVE SYSTEMS INC.

Inventor： Mohammad H. 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.

公开(公告)号：US20200320426A1

公开(公告)日：2020-10-08

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: G06N10/00 ,  H01L39/02 ,  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).