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Prog. Theor. Phys. Vol. 71 No. 1 (1984) pp. 50-61
About the Lagrangian Representation of the Fokker-Planck Dynamics. I
— A Non-Renormalized Description
—
F. Sagués*,** and
L. Garrido*
*Departamento de Fisica Teórica, Universidad de Barcelona
**Departamento de Química Física, Universidad de Barcelona,
Diagonal, 647, Barcelona-28
(Received August 20, 1983)
Abstract:
A functional description of the Fokker-Planck dynamics in terms of a Lagrangian is considered. The powerful functional techniques are used in order to generate a non-renormalized perturbation scheme. We study the same question in a Hamiltonian description. It results that both expansions coincide exactly and can be expressed in a natural way according to a set of diagrams uniquely determined. In addition, the characterization of any propagator like the response function is also discussed.
URL :
http://ptp.ipap.jp/link?PTP/71/50/
DOI : 10.1143/PTP.71.50
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