Nonequilibrium invariant measure under heat flow

Luca Delfini, Stefano Lepri, Roberto Livi, Antonio Politi

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We provide an explicit representation of the nonequilibrium invariant measure for a chain of harmonic oscillators with conservative noise in the presence of stationary heat flow. By first determining the covariance matrix, we are able to express the measure as the product of Gaussian distributions aligned along some collective modes that are spatially localized with power-law tails. Numerical studies show that such a representation applies also to a purely deterministic model, the quartic Fermi-Pasta-Ulam chain.

Original languageEnglish
Article number120604
Number of pages4
JournalPhysical Review Letters
Volume101
Issue number12
DOIs
Publication statusPublished - 19 Sep 2008

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heat transmission
normal density functions
harmonic oscillators
products

Keywords

  • conduction
  • states
  • model

Cite this

Nonequilibrium invariant measure under heat flow. / Delfini, Luca; Lepri, Stefano; Livi, Roberto; Politi, Antonio.

In: Physical Review Letters, Vol. 101, No. 12, 120604, 19.09.2008.

Research output: Contribution to journalArticle

Delfini, Luca ; Lepri, Stefano ; Livi, Roberto ; Politi, Antonio. / Nonequilibrium invariant measure under heat flow. In: Physical Review Letters. 2008 ; Vol. 101, No. 12.
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