Time-Evolving Weiss Fields in the Stochastic Approach to Quantum Spins
arXiv:2011.07924 · doi:10.1103/PhysRevB.104.024408
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.
11 pages, 6 figures
References in corpus (11)
- Thermalization and its mechanism for generic isolated quantum systems
- Real time evolution using the density matrix renormalization group
- Time-evolving a matrix product state with long-ranged interactions
- Many-Body Quantum Spin Dynamics with Monte Carlo Trajectories on a Discrete Phase Space
- Dynamics of correlations in two-dimensional quantum spin models with long-range interactions: A phase-space Monte-Carlo study
- Evaluation of time-dependent correlators after a local quench in iPEPS: hole motion in the t-J model
- Quantum-to-Classical Correspondence and Hubbard-Stratonovich Dynamical Systems, a Lie-Algebraic Approach
- Discrete truncated Wigner approach to dynamical phase transitions in Ising models after a quantum quench
- Fully quantum scalable description of driven dissipative lattice models
- Qubit phase-space: SU(n) coherent state P-representations
- Stochastic Differential Equations for Quantum Dynamics of Spin-Boson Networks