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arxiv: cond-mat/0410131 · v1 · submitted 2004-10-05 · ❄️ cond-mat.other · cond-mat.supr-con· hep-ph· nucl-th

BCS-BEC crossover with a finite-range interaction

Meera M. Parish , Bogdan Mihaila , Eddy M. Timmermans , Krastan B. Blagoev , Peter B. Littlewood This is my paper
classification ❄️ cond-mat.other cond-mat.supr-conhep-phnucl-th
keywords crossoverdilutefinite-rangeinteractionbcs-becchangescleanconverges
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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 pseudo-potential derived by Leggett.

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