Navier-Stokes, Gross-Pitaevskii and Generalized Diffusion Equations using Stochastic Variational Method

Details Navier-Stokes, Gross-Pitaevskii and Generalized Diffusion Equations using Stochastic Variational Method Navier-Stokes, Gross-Pitaevskii and Generalized Diffusion Equations using Stochastic Variational Method

2011-07-31

arxiv.org/abs/1108.0124v2

Physics

Condensed Matter

Statistical Mechanics

26 pages, no figures, Eq. (52) was corrected, references are added

Scientific paper

The stochastic variational method is applied to particle systems and continuum mediums. As the brief review of this method, we first discuss the application to particle Lagrangians and derive a diffusion-type equation and the Schr\"{o}dinger equation with the minimum gauge coupling. We further extend the application of the stochastic variational method to Lagrangians of continuum mediums and show that the Navier-Stokes, Gross-Pitaevskii and generalized diffusion equations are derived. The correction term for the Navier-Stokes equation is also obtained in this method. We discuss the meaning of this correction by comparing with the diffusion equation.

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