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Volume 13: Pages 427-436, 2000
A Survey on the Crossover from BCS Superconductivity to Bose‐Einstein Condensation
G. C. Strinati
Dipartimento di Matematica e Fisica, Sezione INFM, Università di Camerino, I‐62032 Camerino, Italy
The BCS superconducting instability of a Fermi system (due to an attractive interparticle interaction) and the Bose‐Einstein condensation of bosons below a critical temperature can be bridged by following the continuous evolution between the two (BCS and Bose‐Einstein) limits as the strength of the attractive fermion interaction is increased. In addition to being of specific interest for high‐temperature (cuprate) superconductors, a theoretical study of this evolution leads to a deeper understanding of the phenomenon of superconductivity per se. This paper provides a survey of the main ideas and results obtained in this field, with emphasis on the perspectives for future research.
Keywords: superconductivity, theory and models of the superconducting state, BCS theory and its developments, Bose‐Einstein condensation
Received: April 15, 2000; Published online: December 15, 2008