Nonlocal interactions and particle number fluctuations in a solvable model |
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Authors: | E. S. Hernández E. Schwarzkopf |
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Affiliation: | 1. Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina
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Abstract: | We present an extension of Bardeen's model for the formation of Cooper pairs that includes a schematic representation of a nonlocal interaction. The model is exactly solvable and we investigate its Hartree-Fock, BCS and Hartree-Fock-Bogoliubov approximations focusing upon the role and significance of the particle number dispersions. |
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