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Capillary waves and the decay of density correlations at liquid surfaces

机译:毛细管波和液体表面密度相关的衰减

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摘要

Wertheim predicted strong density-density correlations at free liquid surfaces, produced by capillary wave fluctuations of the interface [M. S. Wertheim, J. Chem. Phys. 65, 2377 (1976)]. That prediction has been used to search for a link between capillary wave (CW) theory and density functional (DF) formalism for classical fluids. In particular, Parry et al. have recently analyzed the decaying tails of these CW effects moving away from the interface as a clue for the extended CW theory [A. O. Parry et al., J. Phys.: Condens. Matter 28, 244013 (2016)], beyond the strict long-wavelength limit studied by Wertheim. Some apparently fundamental inconsistencies between the CW and the DF theoretical views of the fluid interfaces arose from the asymptotic analysis of the CW signal. In this paper we revisit the problem of the CW asymptotic decay with a separation of local non-CW surface correlation effects from those that are a truly nonlocal propagation of the CW fluctuations from the surface towards the liquid bulk.
机译:Wertheim通过界面的毛细波波波动产生的自由液面在自由液体表面下预测强的密度密度相关性[M。 S. Wertheim,J.Chem。物理。 65,2377(1976)]。该预测已被用于搜索毛细管波(CW)理论和密度函数(DF)形式主义之间的链路,用于古典流体。特别是帕里等。最近分析了这些CW效应的腐烂尾部,远离接口作为扩展CW理论的线索[A. O. Parry等,J. Phys.: Concens。超出Wertheim研究的严格长波长度的物质28,244013(2016)。在CW信号的渐近分析中,CW和DF理论视图之间的一些显然是显然的基本不一致,从CW信号的渐近分析产生。在本文中,我们重新审视了CW渐近衰减的问题,通过从表面朝向液体堆积的CW波动的真正非竞争传播的那些分离局部非CW表面相关效应。

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