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- W4313482725 abstract "Quantum metrology allows for measuring properties of a quantum system at the optimal Heisenberg limit. However, when the relevant quantum states are prepared using digital Hamiltonian simulation, the accrued algorithmic errors will cause deviations from this fundamental limit. In this work, we show how algorithmic errors due to Trotterized time evolution can be mitigated through the use of standard polynomial interpolation techniques. Our approach is to extrapolate to zero Trotter step size, akin to zero-noise extrapolation techniques for mitigating hardware errors. We perform a rigorous error analysis of the interpolation approach for estimating eigenvalues and time-evolved expectation values, and show that the Heisenberg limit is achieved up to polylogarithmic factors in the error. Our work suggests that accuracies approaching those of state-of-the-art simulation algorithms may be achieved using Trotter and classical resources alone for a number of relevant algorithmic tasks." @default.
- W4313482725 created "2023-01-06" @default.
- W4313482725 creator A5004290683 @default.
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- W4313482725 date "2022-12-28" @default.
- W4313482725 modified "2023-10-16" @default.
- W4313482725 title "Improved Accuracy for Trotter Simulations Using Chebyshev Interpolation" @default.
- W4313482725 doi "https://doi.org/10.48550/arxiv.2212.14144" @default.
- W4313482725 hasPublicationYear "2022" @default.
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