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• W4319601507 abstract "Abstract It is believed that one of the first useful applications for a quantum computer will be the preparation of groundstates of molecular Hamiltonians. A crucial task involving state preparation and readout is obtaining physical observables of such states, which are typically estimated using projective measurements on the qubits. At present, measurement data is costly and time-consuming to obtain on any quantum computing architecture, which has significant consequences for the statistical errors of estimators. In this paper, we adapt common neural network models (restricted Boltzmann machines and recurrent neural networks) to learn complex groundstate wavefunctions for several prototypical molecular qubit Hamiltonians from typical measurement data. By relating the accuracy ɛ of the reconstructed groundstate energy to the number of measurements, we find that using a neural network model provides a robust improvement over using single-copy measurement outcomes alone to reconstruct observables. This enhancement yields an asymptotic scaling near ɛ −1 for the model-based approaches, as opposed to ɛ −2 in the case of classical shadow tomography." @default.
• W4319601507 created "2023-02-09" @default.
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• W4319601507 date "2023-02-09" @default.
• W4319601507 modified "2023-10-16" @default.
• W4319601507 title "Neural network enhanced measurement efficiency for molecular groundstates" @default.
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• W4319601507 doi "https://doi.org/10.1088/2632-2153/acb4df" @default.
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