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Publication

Reliable Devices Yield Stable Quantum Computations

by Samudra Dasgupta, Travis S Humble
Publication Type
Conference Paper
Book Title
2023 IEEE International Conference on Quantum Computing and Engineering (QCE)
Publication Date
Page Numbers
223 to 226
Issue
1
Publisher Location
New Jersey, United States of America
Conference Name
IEEE Quantum Week 2023
Conference Location
Bellevue, Washington, United States of America
Conference Sponsor
Microsoft
Conference Date
-

Stable quantum computation requires noisy results to remain bounded even in the presence of noise fluctuations. Yet non-stationary noise processes lead to drift in the varying characteristics of a quantum device that can greatly influence the circuit outcomes. Here we address how temporal and spatial variations in noise relate device reliability to quantum computing stability. First, our approach quantifies the differences in statistical distributions of characterization metrics collected at different times and locations using Hellinger distance. We then validate an analytical bound that relates this distance directly to the stability of a computed expectation value. Our demonstration uses numerical simulations with models informed by the washington superconducting transmon device. We find that the stability metric is consistently bounded from above by the corresponding Hellinger distance, which can be cast as a specified tolerance level. These results underscore the significance of reliable quantum computing devices and the impact for stable quantum computation.