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arXiv 2310.08053hep-latcond-mat.otherhep-thnucl-thstat.ML
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基于学习最优核的格点实时模拟

Lattice real-time simulations with learned optimal kernels

Daniel Alvestad, Alexander Rothkopf, Dénes Sexty

AI总结:

本文提出一种受强化学习启发的量子场实时模拟策略,结合复朗之万方法与系统先验信息及新最优性准则,显著扩展了1+1维标量场理论模拟范围并避免离散化伪影。

摘要:

我们提出了一种受强化学习启发的量子场实时动力学模拟策略。该策略建立在复朗之万方法之上,并通过系统特定的先验信息对其进行修正,这是克服这一异常严重符号问题的必要前提。我们机器学习方法背后的优化过程之所以可行,是因为部署了固有稳定的复朗之万随机过程求解器,以及从所谓边界项洞察中得出的新颖最优性准则。这一概念和技术上的进展使我们能够显著扩展1+1维标量场理论中实时模拟的范围,超越现有技术水平,并避免困扰先前实时场论模拟的离散化伪影。文中还讨论了该方法的局限性及有前景的未来方向。

英文摘要:

We present a simulation strategy for the real-time dynamics of quantum fields, inspired by reinforcement learning. It builds on the complex Langevin approach, which it amends with system specific prior information, a necessary prerequisite to overcome this exceptionally severe sign problem. The optimization process underlying our machine learning approach is made possible by deploying inherently stable solvers of the complex Langevin stochastic process and a novel optimality criterion derived from insight into so-called boundary terms. This conceptual and technical progress allows us to both significantly extend the range of real-time simulations in 1+1d scalar field theory beyond the state-of-the-art and to avoid discretization artifacts that plagued previous real-time field theory simulations. Limitations of and promising future directions are discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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