Invention Grant
- Patent Title: Systems and methods for degeneracy mitigation in a quantum processor
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Application No.: US15771606Application Date: 2016-10-27
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Publication No.: US11100416B2Publication Date: 2021-08-24
- Inventor: Trevor Michael Lanting , Andrew Douglas King
- Applicant: D-WAVE SYSTEMS INC.
- Applicant Address: CA Burnaby
- Assignee: D-WAVE SYSTEMS INC.
- Current Assignee: D-WAVE SYSTEMS INC.
- Current Assignee Address: CA Burnaby
- Agency: Cozen O'Connor
- International Application: PCT/US2016/059169 WO 20161027
- International Announcement: WO2017/075246 WO 20170504
- Main IPC: G06N10/00
- IPC: G06N10/00

Abstract:
Degeneracy in analog processor (e.g., quantum processor) operation is mitigated via use of floppy qubits or domains of floppy qubits (i.e., qubit(s) for which the state can be flipped with no change in energy), which can significantly boost hardware performance on certain problems, as well as improve hardware performance for more general problem sets. Samples are drawn from an analog processor, and devices comprising the analog processor evaluated for floppiness. A normalized floppiness metric is calculated, and an offset added to advance the device in annealing. Degeneracy in a hybrid computing system that comprises a quantum processor is mitigated by determining a magnetic susceptibility of a qubit, and tuning a tunneling rate for the qubit based on a tunneling rate offset determined based on the magnetic susceptibility. Quantum annealing evolution is controlled by causing the evolution to pause for a determined pause duration.
Public/Granted literature
- US20180330264A1 SYSTEMS AND METHODS FOR DEGENERACY MITIGATION IN A QUANTUM PROCESSOR Public/Granted day:2018-11-15
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