Path Integral Formulation of Anomalous Diffusion Processes

Details Path Integral Formulation of Anomalous Diffusion Processes Path Integral Formulation of Anomalous Diffusion Processes

2011-10-26

arxiv.org/abs/1110.5771v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

We present the path integral formulation of a broad class of generalized diffusion processes. Employing the path integral we derive exact expressions for the path probability densities and joint probability distributions for the class of processes under consideration. We show that Continuous Time Random Walks (CTRWs) are included in our framework. A closed expression for the path probability distribution of CTRWs is found in terms of their waiting time distribution as the solution of a Dyson equation. As the formalism naturally includes the treatment of functionals a generalized Feynman-Kac formula is derived.

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