量子自旋随机方法中的时间演化Weiss场
Time-Evolving Weiss Fields in the Stochastic Approach to Quantum Spins
摘要:
我们通过一个精确映射到随机微分方程来研究非平衡量子自旋系统。该描述在高斯噪声的均值的移位下是不变的。我们表明,可以延长模拟时间的实时动态在一个和两个维度的明智选择,这种转变。这可以动态更新,以减少随机波动的影响。我们在规范P文献中讨论了与漂移规的联系。
英文摘要:
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.
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