Composite boson dominance in many-fermion systems

Details Composite boson dominance in many-fermion systems Composite boson dominance in many-fermion systems

2005-12-21

arxiv.org/abs/cond-mat/0512548v4

Eur. Phys. J. B 56 (2007) 335

Physics

Condensed Matter

Superconductivity

5 pages, no figure

Scientific paper

I recently proposed a method of bosonization based on the use of coherent states of fermion composites, whose validity was restricted to smooth structure functions. In the present paper I remove this limitation and derive results which hold for arbitrary interactions and structure functions. The method respects all symmetries and in particular fermion number conservation. It reproduces exactly the results of the pairing model of atomic nuclei and of the BCS model of superconductivity in the number conserving form of the quasi-chemical equilibrium theory.

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