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arXiv · 1911.02774

Neural-network quantum states at finite temperature

Naoki Irikura·Hiroki Saito
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Abstract

We propose a method to obtain the thermal-equilibrium density matrix of a many-body quantum system using artificial neural networks. The variational function of the many-body density matrix is represented by a convolutional neural network with two input channels. We first prepare an infinite-temperature state, and the temperature is lowered by imaginary-time evolution. We apply this method to the one-dimensional Bose-Hubbard model and compare the results with those obtained by exact diagonalization.

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Naoki Irikura, Hiroki Saito. 2019-11-07. Neural-network quantum states at finite temperature. https://doi.org/10.1103/physrevresearch.2.013284

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