title: Communication: Pseudoisomorphs in liquids with intramolecular degrees of freedom.
abstract: Computer simulations show that liquids of molecules with harmonic intramolecular bonds may have "pseudoisomorphic" lines of approximately invariant dynamics in the thermodynamic phase diagram. We demonstrate that these lines can be identified by requiring scale invariance of the inherent-structure reduced-unit low-frequency vibrational spectrum evaluated for a single equilibrium configuration. This rationalizes why generalized excess-entropy scaling, density scaling, and isochronal superposition apply for many liquids with internal degrees of freedom.
authors.affiliation: Glass and Time, IMFUFA, Department of Science and Environment, Roskilde University, P.O. Box 260, DK-4000 Roskilde, Denmark.
authors.forename: Andreas Elmerdahl
authors.initials: AE
authors.lastname: Olsen
authors.affiliation: Glass and Time, IMFUFA, Department of Science and Environment, Roskilde University, P.O. Box 260, DK-4000 Roskilde, Denmark.
authors.forename: Jeppe C
authors.initials: JC
authors.lastname: Dyre
authors.affiliation: Glass and Time, IMFUFA, Department of Science and Environment, Roskilde University, P.O. Box 260, DK-4000 Roskilde, Denmark.
authors.forename: Thomas B
authors.initials: TB
authors.lastname: Schrøder