title: Coulomb interactions in charged fluids.
abstract: The use of Ewald summation schemes for calculating long-range Coulomb interactions, originally applied to ionic crystalline solids, is a very common practice in molecular simulations of charged fluids at present. Such a choice imposes an artificial periodicity which is generally absent in the liquid state. In this paper we propose a simple analytical O(N(2)) method which is based on Gauss's law for computing exactly the Coulomb interaction between charged particles in a simulation box, when it is averaged over all possible orientations of a surrounding infinite lattice. This method mitigates the periodicity typical of crystalline systems and it is suitable for numerical studies of ionic liquids, charged molecular fluids, and colloidal systems with Monte Carlo and molecular dynamics simulations.
authors.affiliation: Department of Physics and Astronomy, Siena College, Loudonville, New York 12211, USA. gvernizzi@siena.edu
authors.forename: Graziano
authors.initials: G
authors.lastname: Vernizzi
authors.forename: Guillermo Iván
authors.initials: GI
authors.lastname: Guerrero-García
authors.forename: Monica Olvera
authors.initials: MO
authors.lastname: de la Cruz