Fluctuations as stochastic deformation

P. O. Kazinski

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A notion of stochastic deformation is introduced and the corresponding algebraic deformation procedure is developed. This procedure is analogous to the deformation of an algebra of observables like deformation quantization, but for an imaginary deformation parameter (the Planck constant). This method is demonstrated on diverse relativistic and nonrelativistic models with finite and infinite degrees of freedom. It is shown that under stochastic deformation the model of a nonrelativistic particle interacting with the electromagnetic field on a curved background passes into the stochastic model described by the Fokker-Planck equation with the diffusion tensor being the inverse metric tensor. The first stochastic correction to the Newton equations for this system is found. The Klein-Kramers equation is also derived as the stochastic deformation of a certain classical model. Relativistic generalizations of the Fokker-Planck and Klein-Kramers equations are obtained by applying the procedure of stochastic deformation to appropriate relativistic classical models. The analog of the Fokker-Planck equation associated with the stochastic Lorentz-Dirac equation is derived too. The stochastic deformation of the models of a free scalar field and an electromagnetic field is investigated. It turns out that in the latter case the obtained stochastic model describes a fluctuating electromagnetic field in a transparent medium.

Original languageEnglish
Article number041119
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume77
Issue number4
DOIs
Publication statusPublished - 18 Apr 2008
Externally publishedYes

Fingerprint

Fluctuations
Electromagnetic Fields
electromagnetic fields
Fokker-Planck Equation
Fokker-Planck equation
Stochastic Model
Tensor
Deformation Quantization
tensors
Model
Fokker-Planck
Dirac Equation
Dirac equation
Scalar Field
newton
Degree of freedom
algebra
degrees of freedom
Analogue
Metric

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Mathematical Physics

Cite this

Fluctuations as stochastic deformation. / Kazinski, P. O.

In: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Vol. 77, No. 4, 041119, 18.04.2008.

Research output: Contribution to journalArticle

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