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arXiv 2106.04899physics.plasm-phcond-mat.quant-gascond-mat.stat-mech
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热致密物质的非线性密度响应和高阶关联函数

Nonlinear Density Response and Higher Order Correlation Functions in Warm Dense Matter

Tobias Dornheim, Jan Vorberger, Zhandos Moldabekov

摘要:

在最近的一封信[ \textit{Phys.~Rev.~Lett.} ~ \textbf{125},085001(2020)]中,Dornheim \textit{et al.} ~给出了第一个\textit{ab initio}路径积分Monte Carlo(PIMC)结果,用于在温暖的致密物质(WDM)条件下的非线性电子密度响应。在目前的工作中,我们扩展了这些考虑,探索非线性响应和三/四体关联函数从多体理论之间的关系。特别是,这种联系直接意味着电子交换相关(XC)效应的非线性响应的灵敏度急剧增加,这确实是由我们在整个相关范围内的密度($r_s=0.5,\dots,10$)和温度($θ=0.01,\dots,4$)的分析证实。最后,我们的工作表明,故意探测非线性制度的实验探测三,甚至可能四体关联函数在WDM的可能性。

英文摘要:

In a recent letter [\textit{Phys.~Rev.~Lett.}~\textbf{125}, 085001 (2020)], Dornheim \textit{et al.}~have presented the first \textit{ab initio} path integral Monte Carlo (PIMC) results for the nonlinear electronic density response at warm dense matter (WDM) conditions. In the present work, we extend these considerations by exploring the relation between the nonlinear response and three-/four-body correlation functions from many-body theory. In particular, this connection directly implies a comparably increased sensitivity of the nonlinear response to electronic exchange-correlation (XC) effects, which is indeed confirmed by our analysis over the entire relevant range of densities ($r_s=0.5,\dots,10$) and temperatures ($θ=0.01,\dots,4$). Finally, our work suggests the possibility of deliberately probing the nonlinear regime to experimentally probe three- and potentially even four-body correlation functions in WDM.

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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