US 11,797,874 B2
Error reduction and, or, correction in analog computing including quantum processor-based computing
Paul I. Bunyk, New Westminster (CA); James King, Vancouver (CA); Murray C. Thom, Vancouver (CA); Mohammad H. Amin, Coquitlam (CA); Anatoly Smirnov, Vancouver (CA); Sheir Yarkoni, Vancouver (CA); Trevor M. Lanting, Vancouver (CA); Andrew D. King, Vancouver (CA); and Kelly T. R. Boothby, Coquitlam (CA)
Assigned to 1372934 B.C. LTD., Burnaby (CA)
Filed by D-WAVE SYSTEMS INC., Burnaby (CA)
Filed on Jul. 28, 2021, as Appl. No. 17/387,654.
Application 17/387,654 is a continuation of application No. 16/275,816, filed on Feb. 14, 2019, granted, now 11,100,418.
Claims priority of provisional application 62/636,688, filed on Feb. 28, 2018.
Prior Publication US 2022/0019929 A1, Jan. 20, 2022
Int. Cl. G06N 10/00 (2022.01); G06F 11/07 (2006.01)
CPC G06N 10/00 (2019.01) [G06F 11/0736 (2013.01); G06F 11/0751 (2013.01); G06F 11/0793 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of operation in a computational system that comprises both a quantum processor and at least one processor-based device communicatively coupled to one another, the quantum processor comprising a plurality of qubits and a plurality of coupling devices, wherein each coupling device is operable to provide controllable communicative coupling between two of the plurality of qubits, the method comprising:
producing a problem graph representation of a first problem;
identifying each of the qubits that will be operated as a problem qubit, the problem qubit to be used when generating solutions to the first problem;
for each of at least a non-zero number of the qubits that will be operated as problem qubits, identifying a respective ancilla qubit that is exclusively coupled to one qubit of the qubits that will be operated as problem qubits, the ancilla qubits operable to apply an external flux bias to respective problem qubits;
embedding the problem graph representation of the first problem into the problem qubits of the quantum processor;
applying an external flux bias to each problem qubit to at least partially reduce a qubit bias to coupling strength (h/J) ratio misbalance of a respective qubit; and
evolving the quantum processor with the problem graph representation embedded therein to generate solutions to the first problem via the quantum processor.