title: Gas-liquid coexistence in a system of dipolar soft spheres.
abstract: The existence of gas-liquid coexistence in dipolar fluids with no other contribution to attractive interaction than dipole-dipole interaction is a basic and open question in the theory of fluids. Here we compute the gas-liquid critical point in a system of dipolar soft spheres subject to an external electric field using molecular dynamics computer simulation. Tracking the critical point as the field strength is approaching zero we find the following limiting values: T(c)=0.063 and ρ(c)=0.0033 (dipole moment μ=1). These values are confirmed by independent simulation at zero field strength.
authors.affiliation: Fachbereich Mathematik und Naturwissenschaften, Bergische Universität, D-42097 Wuppertal, Germany.
authors.forename: Ran
authors.initials: R
authors.lastname: Jia
authors.forename: Heiko
authors.initials: H
authors.lastname: Braun
authors.forename: Reinhard
authors.initials: R
authors.lastname: Hentschke