Rodgers Jocelyn M, Kaur Charanbir, Chen Yng-Gwei, Weeks John D
Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, USA.
Phys Rev Lett. 2006 Sep 1;97(9):097801. doi: 10.1103/PhysRevLett.97.097801. Epub 2006 Aug 28.
Effective attraction between like-charged walls mediated by counterions is studied using local molecular field (LMF) theory. Monte Carlo simulations of the "mimic system" given by LMF theory, with short-ranged "Coulomb core" interactions in an effective single particle potential incorporating a mean-field average of the long-ranged Coulomb interactions, provide a direct test of the theory, and are in excellent agreement with more complex simulations of the full Coulomb system by Moreira and Netz [Eur. Phys. J. E 8, 33 (2002)]. A simple, generally applicable criterion to determine the consistency parameter sigma(min) needed for accurate use of the LMF theory is presented.
利用局域分子场（LMF）理论研究了由反离子介导的同性带电壁之间的有效吸引力。对LMF理论给出的“模拟系统”进行蒙特卡罗模拟，在包含长程库仑相互作用平均场平均值的有效单粒子势中具有短程“库仑核”相互作用，为该理论提供了直接检验，并且与莫雷拉和内茨对完整库仑系统进行的更复杂模拟[《欧洲物理杂志E》8, 33 (2002)] 高度吻合。提出了一个简单的、普遍适用的准则，用于确定准确使用LMF理论所需的一致性参数σ(min)。
