Neural-network quantum states at finite temperature

  title={Neural-network quantum states at finite temperature},
  author={Naoki Irikura and Hiroki Saito},
  journal={Physical Review Research},
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… 

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