In this paper we show how the perturbative procedure known as stochastic limit may be useful in the analysis of the open BCS model discussed by Buffet and Martin as a spin system interacting with a fermionic reservoir. In particular we show how the same values of the critical temperature and of the order parameters can be found with a significantly simpler approach.
BAGARELLO F (2004). The stochastic limit in the analysis of the open BCS model. JOURNAL OF PHYSICS. A, MATHEMATICAL AND GENERAL, 37, 2537-2548 [10.1088/0305-4470/37/7/002].
The stochastic limit in the analysis of the open BCS model
BAGARELLO, Fabio
2004-01-01
Abstract
In this paper we show how the perturbative procedure known as stochastic limit may be useful in the analysis of the open BCS model discussed by Buffet and Martin as a spin system interacting with a fermionic reservoir. In particular we show how the same values of the critical temperature and of the order parameters can be found with a significantly simpler approach.
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