Ab initio quantum Monte Carlo simulation of the warm dense electron gas
Ab initio quantum Monte Carlo simulation of the warm dense electron gas
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DOI：
10.1063/1.4977920
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发表时间：
2017-05-01
影响因子：
2.2
通讯作者：
Bonitz, Michael
中科院分区：
文献类型：
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作者：
Dornheim, Tobias;Groth, Simon;Bonitz, Michael
热致密物质是等离子体物理学中最活跃的前沿领域之一，因为它与致密天体物理学对象和新的实验室实验有关，其中物质被强烈压缩，例如。例如，在一个实施例中，高功率激光器。它的描述在理论上是非常具有挑战性的，因为它包含在有限温度下的相关量子电子-一个无法用标准分析或基态方法精确建模的系统。近年来，在费米量子蒙特卡罗模拟领域取得了一些突破性进展。首先，它表明，有限模型系统（30。100个电子）是可能的，这避免了任何简化近似，例如固定节点[Schoof等人，物理修订信函115，130402（2015）]。其次，Dornheim等人报道了一种将这些结果准确外推到热力学极限的新方法[Phys. Rev. Lett. 117，156403（2016）]。结果，现在热的稠密电子气的热力学结果是可用的，其具有0.1%量级的前所未有的精度。在这里，我们对这些结果进行了概述，并讨论了局限性和未来的发展方向。出版社：AIP Publishing
Warm dense matter is one of the most active frontiers in plasma physics due to its relevance for dense astrophysical objects and for novel laboratory experiments in which matter is being strongly compressed, e. g., by high-power lasers. Its description is theoretically very challenging as it contains correlated quantum electrons at finite temperature-a system that cannot be accurately modeled by standard analytical or ground state approaches. Recently, several breakthroughs have been achieved in the field of fermionic quantum Monte Carlo simulations. First, it was shown that exact simulations of a finite model system (30. 100 electrons) are possible, which avoid any simplifying approximations such as fixed nodes [Schoof et al., Phys. Rev. Lett. 115, 130402 (2015)]. Second, a novel way to accurately extrapolate these results to the thermodynamic limit was reported by Dornheim et al. [Phys. Rev. Lett. 117, 156403 (2016)]. As a result, now thermodynamic results for the warm dense electron gas are available, which have an unprecedented accuracy on the order of 0.1%. Here, we present an overview on these results and discuss limitations and future directions. Published by AIP Publishing.