title: Do the repulsive and attractive pair forces play separate roles for the physics of liquids?
abstract: According to standard liquid-state theory repulsive and attractive pair forces play distinct roles for the physics of liquids. This paradigm is put into perspective here by demonstrating a continuous series of pair potentials that have virtually the same structure and dynamics, although only some of them have attractive forces of significance. Our findings reflect the fact that the motion of a given particle is determined by the total force on it, whereas the quantity usually discussed in liquid-state theory is the individual pair force.
authors.affiliation: DNRF Centre 'Glass and Time', IMFUFA, Department of Sciences, Roskilde University, Postbox 260, DK-4000 Roskilde, Denmark.
authors.forename: Lasse
authors.initials: L
authors.lastname: Bøhling
authors.forename: Arno A
authors.initials: AA
authors.lastname: Veldhorst
authors.forename: Trond S
authors.initials: TS
authors.lastname: Ingebrigtsen
authors.forename: Nicholas P
authors.initials: NP
authors.lastname: Bailey
authors.forename: Jesper S
authors.initials: JS
authors.lastname: Hansen
authors.forename: Søren
authors.initials: S
authors.lastname: Toxvaerd
authors.forename: Thomas B
authors.initials: TB
authors.lastname: Schrøder
authors.forename: Jeppe C
authors.initials: JC
authors.lastname: Dyre
mesh_terms: D055598:Chemical Phenomena; D052578:Ionic Liquids / Q000737:chemistry*; D008958:Models, Molecular; D010316:Particle Size; D014867:Water / Q000737:chemistry*
chemical_list: D052578:Ionic Liquids; D014867:Water