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Physics Letters B

The self consistent RPA in a many level pairing model

J. Dukelsky, Peter Schuck

Published Oct 1, 1999• 29 citations
Publisher
DOI
10.1016/s0370-2693(99)00921-1

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A self-consistent version of the thermal random phase approximation (TSCRPA) is developed within the Matsubara Green’s function formalism. The TSCRPA is applied to the many-level pairing model, and the normal phase of the system is considered. The TSCRPA results are compared with the exact ones calculated for the grand canonical ensemble. Advantages of the TSCRPA over the thermal mean-field approximation and the standard thermal random phase approximation are demonstrated. Results for correlation functions, excitation energies, etc., as a function of temperature are presented.