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- W2949453985 abstract "We investigate the performance of error mitigation via measurement of conserved symmetries on near-term devices. We present two protocols to measure conserved symmetries during the bulk of an experiment, and develop a zero-cost post-processing protocol which is equivalent to a variant of the quantum subspace expansion. We develop methods for inserting global and local symetries into quantum algorithms, and for adjusting natural symmetries of the problem to boost their mitigation against different error channels. We demonstrate these techniques on two- and four-qubit simulations of the hydrogen molecule (using a classical density-matrix simulator), finding up to an order of magnitude reduction of the error in obtaining the ground state dissociation curve." @default.
- W2949453985 created "2019-06-27" @default.
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- W2949453985 date "2018-12-28" @default.
- W2949453985 modified "2023-10-01" @default.
- W2949453985 title "Low-cost error mitigation by symmetry verification" @default.
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- W2949453985 doi "https://doi.org/10.1103/physreva.98.062339" @default.
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