NDLI: Casimir interaction among heavy fermions in the BCS-BEC crossover

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Casimir interaction among heavy fermions in the BCS-BEC crossover

Content Provider	Semantic Scholar
Author	Nishida, Yusuke
Copyright Year	2009
Abstract	Citation Nishida, Yusuke. " Casimir interaction among heavy fermions in the BCS-BEC crossover. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. We investigate a two-species Fermi gas with a large mass ratio interacting by an interspecies short-range interaction. Using the Born-Oppenheimer approximation, we determine the interaction energy of two heavy fermions immersed in the Fermi sea of light fermions as a function of the s-wave scattering length. In the BCS limit, we recover the perturbative calculation of the effective interaction between heavy fermions. The p-wave projection of the effective interaction is attractive in the BCS limit while it turns out to be repulsive near the unitarity limit. We find that the p-wave attraction reaches its maximum between the BCS and unitarity limits, where the maximal p-wave pairing of heavy minority fermions is expected. We also investigate the case where the heavy fermions are confined in two dimensions and the p-wave attraction between them is found to be stronger than that in three dimensions.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://dspace.mit.edu/openaccess-disseminate/1721.1/51364
Language	English
Access Restriction	Open
Subject Keyword	Approximation Battery eliminator circuit Dimensions Femtometer Fermi (microarchitecture) Gases Html Link Type - copyright Interaction energy Maximal set Perturbation theory (quantum mechanics) Scattering length Terms of service Trochoidal wave Unitarity (physics) benefit citation
Content Type	Text
Resource Type	Article

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