BCS-BEC crossover with a finite-range interaction

Meera M. Parish, Bogdan Mihaila, Eddy M. Timmermans, Krastan B. Blagoev, Peter B. Littlewood

Research output: Contribution to journalArticleResearchpeer-review

36 Citations (Scopus)


We study the crossover from BEC to BCS pairing for dilute systems but with a realistic finite-range interaction. We exhibit the changes in the excitation spectrum that provide a clean qualitative distinction between the two limits. We also study how the dilute system converges to the results from a zero-range pseudopotential derived by Leggett.

Original languageEnglish
Article number064513
JournalPhysical Review B
Issue number6
Publication statusPublished - 1 Feb 2005
Externally publishedYes

Cite this