Time-Evolving Weiss Fields in the Stochastic Approach to Quantum Spins
Strongly Correlated Electrons
2021-12-28 v3 Quantum Physics
Abstract
We investigate non-equilibrium quantum spin systems via an exact mapping to stochastic differential equations. This description is invariant under a shift in the mean of the Gaussian noise. We show that one can extend the simulation time for real-time dynamics in one and two dimensions by a judicious choice of this shift. This can be updated dynamically in order to reduce the impact of stochastic fluctuations. We discuss the connection to drift gauges in the gauge-P literature.
Cite
@article{arxiv.2011.07924,
title = {Time-Evolving Weiss Fields in the Stochastic Approach to Quantum Spins},
author = {S. E. Begg and A. G. Green and M. J. Bhaseen},
journal= {arXiv preprint arXiv:2011.07924},
year = {2021}
}
Comments
11 pages, 6 figures