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arXiv 1402.5797physics.plasm-phcond-mat.stat-mech
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Yukawa液体中的线性和二次静态响应函数和结构函数

Linear and quadratic static response functions and structure functions in Yukawa liquids

P. Magyar, Z. Donko, G. J. Kalman, K. I. Golden

摘要:

在分子动力学模拟中,通过引入外部微扰势,我们计算了三维Yukawa液体的线性和二次静态密度响应函数。响应函数也由系统的平衡涨落(静态结构因子)通过涨落耗散定理得到。用两种不同方法得到的二次响应函数吻合较好,证实了二次涨落耗散定理。我们还发现,三点结构函数可以分解成两点结构函数,导致集群表示的平衡三重关联函数。

英文摘要:

We compute linear and quadratic static density response functions of three-dimensional Yukawa liquids by applying an external perturbation potential in molecular dynamics simulations. The response functions are also obtained from the equilibrium fluctuations (static structure factors) in the system via the fluctuation-dissipation theorems. The good agreement of the quadratic response functions, obtained in the two different ways confirms the quadratic fluctuation-dissipation theorem. We also find that the three-point structure function may be factorizable into two-point structure functions, leading to a cluster representation of the equilibrium triplet correlation function.

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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