Abstract
A system of equations that includes a generalized kinetic equation and equations for the static correlation functions is constructed for a normal quantum system of interacting Bose and Fermi particles with two-body interaction on the basis of the method of two-time finite-temperature Green's functions. The equations are in general valid for systems with arbitrary density of the particles. A method of successive approximation that makes it possible to go beyond the usual low-density expansion is discussed. The proposed method leads to a renormalization of the collision integral and makes it possible to obtain correlation functions for the total energy density, including its potential part.
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Additional information
V. A. Steklov Mathematics Institute, Russian Academy of Sciences. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 96, No. 3, pp. 351–372, September, 1993.
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Tserkovnikov, Y.A. Kinetic equations in the method of two-time finite-temperature Green's functions. I. Renormalization of the collision integral. Theor Math Phys 96, 1013–1026 (1993). https://doi.org/10.1007/BF01019064
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DOI: https://doi.org/10.1007/BF01019064