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Superadiabatic forces in brownian many-body dynamics

  • Fortini, Andrea Theoretische Physik II, Physikalisches Institut, Universität Bayreuth, Bayreuth, Germany
  • Heras, Daniel de las Theoretische Physik II, Physikalisches Institut, Universität Bayreuth, Bayreuth, Germany
  • Brader, Joseph M. Soft Matter Theory, University of Fribourg, Switzerland
  • Schmidt, Matthias Theoretische Physik II, Physikalisches Institut, Universität Bayreuth, Bayreuth, Germany
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    13.10.2014
Published in:
  • Physical Review Letters. - 2014, vol. 113, no. 16, p. 167801
English Theoretical approaches to nonequilibrium many-body dynamics generally rest upon an adiabatic assumption, whereby the true dynamics is represented as a sequence of equilibrium states. Going beyond this simple approximation is a notoriously difficult problem. For the case of classical Brownian many-body dynamics, we present a simulation method that allows us to isolate and precisely evaluate superadiabatic correlations and the resulting forces. Application of the method to a system of one-dimensional hard particles reveals the importance for the dynamics, as well as the complexity, of these nontrivial out-of-equilibrium contributions. Our findings help clarify the status of dynamical density functional theory and provide a rational basis for the development of improved theories.
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/304044
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