Operating quantum devices using a temporal metric

By using past time data to optimize operating parameters and construct a cost function that accounts for potential defects, the method reduces decoherence in quantum computing devices, enhancing computational accuracy and scalability.

CA3231384CActive Publication Date: 2026-09-22GOOGLE LLC
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Patent Information

Application Number
CA3231384
Authority / Receiving Office
CA · CA
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-09-13
Filing Date
2022-09-06
Publication Date
2026-09-22
Estimated Expiration
2042-09-06

AI Technical Summary

Technical Problem

Quantum computing devices face decoherence issues due to time-dependent defects, such as two-level-system (TLS) defects, which cause fluctuations in energy relaxation times, leading to increased computational errors and hindering the scaling of quantum computers.

Method used

A method that utilizes past time data to predict and avoid future defects by constructing a cost function with weighted terms that incorporate past and potentially future defect states, optimizing operating parameters to reduce the likelihood of collisions with TLS defects.

Benefits of technology

Reduces computational errors and improves coherency in quantum computing systems, enabling the scaling of quantum computing systems with more qubits by operating qubits at frequencies that minimize defects.

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Abstract

Systems and methods for operating one or more qubits in a quantum computing system are provided. In some examples, a method can include obtaining past time data associated with a temporal metric of an operating parameter of a qubit in a quantum device. The method can include selecting an operating parameter value based at least in part on the past time data associated with the temporal metric of the operating parameter to reduce likelihood of occurrence of a time dependent defect. The time dependent defect can exhibit a time dependent behavior. The method can include operating the qubit in the quantum device at the operating parameter value.
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