Abstract
In this section we describe four models of quantum statistical mechanics, namely, the BCS (Bardeen -Cooper-Schrieffer) model of superconductivity, the Bogolyubov model of superfluidity, the model of Huang, Yang, and Luttinger, and the Peierls-Frohlich model. We employ the following scheme: First, we define model Hamiltonians for systems of particles contained in a bounded region (cube) ∧ with periodic boundary conditions and then pass to the thermodynamic limit and study the corresponding limiting model Hamiltonian. The procedure of limit transition is not justified; it enables one to determine the model Hamiltonian of an infinite system which is then studied rigorously.
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Petrina, D.Y. (1995). Exactly Solvable Models. In: Mathematical Foundations of Quantum Statistical Mechanics. Mathematical Physics Studies, vol 17. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0185-1_6
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DOI: https://doi.org/10.1007/978-94-011-0185-1_6
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