Goldstone and Higgs Hydrodynamics in the BCS–BEC Crossover

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ID: 66846
2017
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Abstract
We discuss the derivation of a low-energy effective field theory of phase (Goldstone) and amplitude (Higgs) modes of the pairing field from a microscopic theory of attractive fermions. The coupled equations for Goldstone and Higgs fields are critically analyzed in the Bardeen–Cooper–Schrieffer (BCS)-to-Bose–Einstein condensate (BEC) crossover—both in three spatial dimensions and in two spatial dimensions. The crucial role of pair fluctuations is investigated, and the beyond-mean-field Gaussian theory of the BCS–BEC crossover is compared with available experimental data of the two-dimensional ultracold Fermi superfluid.
Reference Key
salasnich2017goldstonecondensed Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Salasnich, Luca;
Journal condensed matter
Year 2017
DOI
DOI not found
URL
http://www.mdpi.com/2410-3896/2/2/22
Keywords
Science physics astrophysics

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