Dissipation, fluctuations and conservation laws

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A large particle moves through a sea of small particles. On the microscale, all particle collisions are elastic. However, on the macroscale, where only the large particle is properly resolved, dissipative forces and fluctuating random forces are observed. These forces are connected by a fluctuation–dissipationtheorem proved in two different ways, first via statistical mechanics, and second from fundamental classical mechanical principles of momentum and energy conservation. The novel classical mechanics proof elucidates the relation between micro- and macroscale behaviors, and offers new insights into the physics behind the fluctuation–dissipation result.
Original languageEnglish
Pages (from-to)113-119
Number of pages7
JournalAmerican Journal of Physics
Volume69
Issue number2
DOIs
Publication statusPublished - Feb 2001

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Statistical mechanics
conservation laws
Conservation
Momentum
Energy conservation
Mechanics
dissipation
Physics
microbalances
particle collisions
classical mechanics
energy conservation
statistical mechanics
conservation
momentum
physics

Keywords

  • particle fluctuations
  • classical mechanics
  • classical statistical mechanics
  • conservation laws
  • elastic collisions

Cite this

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Dissipation, fluctuations and conservation laws. / Grassia, Paul.

In: American Journal of Physics, Vol. 69, No. 2, 02.2001, p. 113-119.

Research output: Contribution to journalArticle

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