Macroscopic energy diffusion for a chain of anharmonic oscillators

Stefano Olla, Makiko Sasada

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


We study the energy diffusion in a chain of anharmonic oscillators where the Hamiltonian dynamics is perturbed by a local energy conserving noise. We prove that under diffusive rescaling of space-time, energy fluctuations diffuse and evolve following an infinite dimensional linear stochastic differential equation driven by the linearized heat equation. We also give variational expressions for the thermal diffusivity and some upper and lower bounds.

Original languageEnglish
Pages (from-to)721-775
Number of pages55
JournalProbability Theory and Related Fields
Issue number3-4
Publication statusPublished - 2013 Dec
Externally publishedYes

ASJC Scopus subject areas

  • Analysis
  • Statistics and Probability
  • Statistics, Probability and Uncertainty


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