Renormalisation Flow and Universality for Ultracold Fermionic Atoms

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dc.creatorDiehl, S.
dc.creatorGies, H.
dc.creatorPawlowski, J. M.
dc.creatorWetterich, C.
dc.date2007-03-14
dc.date2007-10-30
dc.date.accessioned2026-07-07T11:42:54Z
dc.date.available2026-07-07T11:42:54Z
dc.descriptionA functional renormalisation group study for the BEC-BCS crossover for ultracold gases of fermionic atoms is presented. We discuss the fixed point which is at the origin of universality for broad Feshbach resonances. All macroscopic quantities depend only on one relevant parameter, the concentration a k_F, besides their dependence on the temperature in units of the Fermi energy. In particular, we compute the universal ratio between molecular and atomic scattering length in vacuum. We also present an estimate to which level of accuracy universality holds for gases of Li and K atoms.
dc.description19 pages, 3 figures, to be published in PRA
dc.identifierhttps://arxiv.org/abs/cond-mat/0703366
dc.identifierhttp://arxiv.org/abs/cond-mat/0703366
dc.identifierPhys.Rev.A76:053627,2007
dc.identifierdoi:10.1103/PhysRevA.76.053627
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201053
dc.subjectSuperconductivity
dc.subjectStatistical Mechanics
dc.subjectHigh Energy Physics - Theory
dc.subjectQuantum Physics
dc.titleRenormalisation Flow and Universality for Ultracold Fermionic Atoms
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