Open access
Date
2023-10Type
- Journal Article
Abstract
Variational quantum time evolution allows us to simulate the time dynamics of quantum systems with near-term compatible quantum circuits. Due to the variational nature of this method the accuracy of the simulation is a priori unknown. We derive a posteriori global phase agnostic error bounds for the state simulation accuracy with variational quantum time evolution that improve the tightness of fidelity esti-mates over existing a posteriori error bounds. These analysis tools are practically crucial for assessing the quality of the simulation and making informed choices about simulation hyperparameters. The effi-cient, a posteriori evaluation of the bounds can be tightly integrated with the variational time simulation and, hence, results in a minor resource overhead, which is governed by the system's energy variance. The performance of the error bounds is demonstrated on numerical examples. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000642255Publication status
publishedExternal links
Journal / series
Physical Review AppliedVolume
Pages / Article No.
Publisher
American Physical SocietyMore
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