Prog. Theor. Phys. Vol. 74 No. 2 (1985) pp. 429-432

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Letters

A General Formulation of Nonequilibrium Thermo Field Dynamics

T. Arimitsu and H. Umezawa

Theoretical Physics Institute, Department of Physics, The University of Alberta, Edmonton, Alberta T6G 2J1

(Received April 22, 1985)

Abstract:

A fundamental framework for construction of a quantum field theory for open systems is built on two basic concepts; the coarse graining realized by the projection operator method of the damping theory, and of the thermal state, a fundamental concept in the thermo field dynamics.

URL : http://ptp.ipap.jp/link?PTP/74/429/
DOI : 10.1143/PTP.74.429

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