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- W3194208695 abstract "Characterizing noisy quantum devices requires methods for learning the underlying quantum Hamiltonian which governs their dynamics. Often, such methods compare measurements to simulations of candidate Hamiltonians, a task which requires exponential computational complexity. Here, we analyze and optimize a method which circumvents this difficulty using measurements of short time dynamics. We provide estimates for the optimal measurement schedule and reconstruction error. We demonstrate that the reconstruction requires a system-size independent number of experimental shots, and characterize an informationally-complete set of state preparations and measurements for learning local Hamiltonians. Finally, we show how grouping of commuting observables and use of Hamiltonian symmetries can improve the Hamiltonian reconstruction." @default.
- W3194208695 created "2021-08-30" @default.
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- W3194208695 date "2021-08-19" @default.
- W3194208695 modified "2023-09-27" @default.
- W3194208695 title "Optimized Hamiltonian learning from short-time measurements" @default.
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