Relevance of the pair-pair interaction in the crossover from BCS to Bose-Einstein condensation

Authors
Pieri, P Strinati, GC
Citation
P. Pieri et Gc. Strinati, Relevance of the pair-pair interaction in the crossover from BCS to Bose-Einstein condensation, PHYSICA C, 341, 2000, pp. 155-156
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA C
ISSN journal
09214534 → ACNP
Volume
341
Year of publication
2000
Part
1
Pages
155 - 156
Database
ISI
SICI code
0921-4534(200011)341:<155:ROTPII>2.0.ZU;2-G
Abstract
We show that, to deal correctly with the pair-pair interaction in the cross over from BCS superconductivity to Bose-Einstein condensation, self-consist ency in the fermionic T-matrix approximation is insufficient in the strong- coupling limit, and an appropriate set of diagrams corresponding to a dilut e gas of composite bosons has to be included. The resulting effect on the p air-pair scattering length is evaluated.