Fluctuation Profiles in Inhomogeneous Fluids

Tobias Eckert, Nico C. X. Stuhlmüller, Florian Sammüller, and Matthias Schmidt
Phys. Rev. Lett. 125, 268004 – Published 30 December 2020
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Abstract

Three one-body profiles that correspond to local fluctuations in energy, in entropy, and in particle number are used to describe the equilibrium properties of inhomogeneous classical many-body systems. Local fluctuations are obtained from thermodynamic differentiation of the density profile or equivalently from average microscopic covariances. The fluctuation profiles follow from functional generators and they satisfy Ornstein-Zernike relations. Computer simulations reveal markedly different fluctuations in confined fluids with Lennard-Jones, hard sphere, and Gaussian core interactions.

  • Figure
  • Received 30 September 2020
  • Accepted 9 December 2020

DOI:https://doi.org/10.1103/PhysRevLett.125.268004

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Polymers & Soft Matter

Authors & Affiliations

Tobias Eckert*, Nico C. X. Stuhlmüller*, Florian Sammüller*, and Matthias Schmidt

  • Theoretische Physik II, Physikalisches Institut, Universität Bayreuth, D-95447 Bayreuth, Germany

  • *These authors contributed equally to this work.

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Issue

Vol. 125, Iss. 26 — 31 December 2020

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