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arXiv physics/0001047physics.plasm-phphysics.comp-ph
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氘Hugoniot的路径积分Monte Carlo计算

Path Integral Monte Carlo Calculation of the Deuterium Hugoniot

B. Militzer, D. M. Ceperley

摘要:

限制路径积分蒙特卡罗模拟被用来计算氘在10000 < T < 1000000 K温度范围内的平衡性质,这两种密度分别为0.674和0.838 gcm^-3(rs = 2.00和1.86)。利用计算得到的内能和压强,我们估算了冲击Hugoniot,并与最近的激光冲击波实验进行了比较。我们研究了有限尺寸效应和路径积分对时间步长的依赖性。此外,我们比较了从自洽的变分原理,其中包括相互作用和束缚态与自由粒子的节点限制所获得的结果。

英文摘要:

Restricted path integral Monte Carlo simulations have been used to calculate the equilibrium properties of deuterium for two densities: 0.674 and 0.838 gcm^-3 (rs = 2.00 and 1.86) in the temperature range of 10000 < T < 1000000 K. Using the calculated internal energies and pressures we estimate the shock hugoniot and compare with recent Laser shock wave experiments. We study finite size effects and the dependence on the time step of the path integral. Further, we compare the results obtained with a free particle nodal restriction with those from a self-consistent variational principle, which includes interactions and bound states.

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