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arXiv 1408.6523cond-mat.str-elphysics.chem-phquant-ph
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氘Hugoniot分子-原子跃迁的耦合电子-离子蒙特卡罗模拟

Molecular-Atomic Transition in the Deuterium Hugoniot with Coupled Electron Ion Monte Carlo

Norm M. Tubman, Elisa Liberatore, Carlo Pierleoni, Markus Holzmann, David M. Ceperley

摘要:

我们已经进行了精确的模拟氘Hugoniot使用耦合电子离子蒙特卡罗(CEIMC)。使用高度精确的量子蒙特卡罗方法的电子,我们研究的区域最大压缩沿主Hugoniot,在那里系统经历了一个连续的过渡,从分子流体到单原子流体。我们包括所有相关的物理修正,以便可以直接与实验进行比较。在50 GPa左右,我们发现最大压缩为4.85,比以前的理论预测和实验数据大大约10%,但由于它们的不确定性很大,仍然与后者兼容。

英文摘要:

We have performed accurate simulations of the Deuterium Hugoniot using Coupled Electron Ion Monte Carlo (CEIMC). Using highly accurate quantum Monte Carlo methods for the electrons, we study the region of maximum compression along the principal Hugoniot, where the system undergoes a continuous transition from a molecular fluid to a monatomic fluid. We include all relevant physical corrections so that a direct comparison to experiment can be made. Around 50 GPa we found a maximum compression of 4.85, roughly 10% larger than previous theoretical predictions and experimental data but still compatible with the latter because of their large uncertainty.

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