SciPost Phys. 4, 013 (2018) ·
published 28 February 2018

· pdf
The efficient representation of quantum manybody states with classical
resources is a key challenge in quantum manybody theory. In this work we
analytically construct classical networks for the description of the quantum
dynamics in transversefield Ising models that can be solved efficiently using
Monte Carlo techniques. Our perturbative construction encodes timeevolved
quantum states of spin1/2 systems in a network of classical spins with local
couplings and can be directly generalized to other spin systems and higher
spins. Using this construction we compute the transient dynamics in one, two,
and three dimensions including local observables, entanglement production, and
Loschmidt amplitudes using Monte Carlo algorithms and demonstrate the accuracy
of this approach by comparisons to exact results. We include a mapping to
equivalent artificial neural networks, which were recently introduced to
provide a universal structure for classical network wave functions.