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arXiv physics/0405140physics.plasm-ph
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氢Hugoniot的Monte Carlo结果

Monte Carlo results for the hydrogen Hugoniot

V. Bezkrovniy, V. S. Filinov, D. Kremp, M. Bonitz, M. Schlanges, W. D. Kraeft, P. R. Levashov, V. E. Fortov

摘要:

我们提出了一个理论Hugoniot得到的状态方程(EOS)的直接路径积分蒙特卡罗技术(DPIMC)和反应包埋蒙特卡罗(REMC)模拟的结果相结合。这种建议的主要思想是基于这样一个事实,即DPMIC提供了广泛的密度和温度,包括部分电离等离子体区域的第一原理的结果。另一方面,对于分子形成占主导地位的较低温度,DPIMC模拟变得繁琐和低效。对于该区域,可以使用精确的REMC模拟,其中使用Kolos和Wolniewicz计算的结合势在Born-Oppenheimer水平上处理结合态(分子)。剩余的相互作用,然后减少到中性粒子之间的散射,这是可靠的处理经典应用有效电位。所得Hugoniot位于Knudson { \textit{et al.} } \cite{1}和Collins { \textit{et al.} } \cite{2}的实验值之间。

英文摘要:

We propose a theoretical Hugoniot obtained by combining results for the equation of state (EOS) from the Direct Path Integral Monte Carlo technique (DPIMC) and those from Reaction Ensemble Monte Carlo (REMC) simulations. The main idea of such proposal is based on the fact that DPMIC provides first-principle results for a wide range of densities and temperatures including the region of partially ionized plasmas. On the other hand, for lower temperatures where the formation of molecules becomes dominant, DPIMC simulations become cumbersome and inefficient. For this region it is possible to use accurate REMC simulations where bound states (molecules) are treated on the Born-Oppenheimer level using a binding potential calculated by Kolos and Wolniewicz. The remaining interaction is then reduced to the scattering between neutral particles which is reliably treated classically applying effective potentials. The resulting Hugoniot is located between the experimental values of Knudson {\textit{et al.}} \cite{1} and Collins {\textit{et al.}} \cite{2}.

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