Prog. Theor. Phys. Vol. 86 No. 3 (1991) pp. 617-651

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The Generating Functional of the Non-Equilibrium Process

— The Case of Macrovariable —

Masayoshi Sumino, Reijiro Fukuda and Hitoshi Higurashi

Department of Physics, Faculty of Science and Technology, Keio University, Yokohama 223

(Received April 15, 1991)

Abstract:

The generating functional of the non-equilibrium process is discussed and applied to the macroscopic system in order to derive the equation of motion of the macrovariables. The detailed diagrammatical rule for evaluating the generating functional is given for the arbitrary initial distribution. The propagator which is independent of the initial condition is shown to contain only a single retarded propagator. For the case of macrovariables a compact expression for the generating functional is obtained. A simple example is also discussed.

URL : http://ptp.ipap.jp/link?PTP/86/617/
DOI : 10.1143/PTP.86.617

References:

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