Oscillatory Force Autocorrelations in Equilibrium Odd-Diffusive Systems

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Erik Kalz - , Universität Potsdam (Autor:in)
  • Hidde Derk Vuijk - , Universität Augsburg (Autor:in)
  • Jens Uwe Sommer - , Exzellenzcluster PoL: Physik des Lebens, Professur für Theorie der Polymere an Grenzflächen (gB/IPF), Leibniz-Institut für Polymerforschung Dresden, Technische Universität Dresden (Autor:in)
  • Ralf Metzler - , Universität Potsdam, Asia Pacific Center for Theoretical Physics (Autor:in)
  • Abhinav Sharma - , Universität Augsburg, Leibniz-Institut für Polymerforschung Dresden (Autor:in)

Abstract

The force autocorrelation function (FACF), a concept of fundamental interest in statistical mechanics, encodes the effect of interactions on the dynamics of a tagged particle. In equilibrium, the FACF is believed to decay monotonically in time, which is a signature of slowing down of the dynamics of the tagged particle due to interactions. Here, we analytically show that in odd-diffusive systems, which are characterized by a diffusion tensor with antisymmetric elements, the FACF can become negative and even exhibit temporal oscillations. We also demonstrate that, despite the isotropy, the knowledge of FACF alone is not sufficient to describe the dynamics: the full autocorrelation tensor is required and contains an antisymmetric part. These unusual properties translate into enhanced dynamics of the tagged particle quantified via the self-diffusion coefficient that, remarkably, increases due to particle interactions.

Details

OriginalspracheEnglisch
Aufsatznummer057102
FachzeitschriftPhysical review letters
Jahrgang132
Ausgabenummer5
PublikationsstatusVeröffentlicht - 2 Feb. 2024
Peer-Review-StatusJa

Externe IDs

PubMed 38364150

Schlagworte

ASJC Scopus Sachgebiete