2014/04/16 by S. N. Klimin, J. Tempere, J. T. Devreese · 4 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Crossover #Electron #Fermi Gamma-ray Space Telescope #Fermi gas #Formalism (music) #Ginzburg–Landau theory #Physics #Quantum electrodynamics #Quantum mechanics #Quantum, superfluid, helium dynamics #Superconductivity #Superfluidity #Thermodynamics #Vortex #Wave function #cond-mat.quant-gas
paper · pdf · doi:10.1016/j.physc.2014.03.030
published in Physica C Superconductivity 503, 136-139 (Elsevier BV) · 4 pages, 2 figures
openalex publication_date 2014/04/16 · arxiv created 2015/08/19 · arxiv updated 2015/08/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In the context of superfluid Fermi gases, the Ginzburg - Landau (GL) formalism for the macroscopic wave function has been successfully extended to the whole temperature range where the superfluid state exists. After reviewing the formalism, we first investigate the temperature-dependent correction to the standard GL expansion (which is valid close to Tc). Deviations from the standard GL formalism are particularly important for the kinetic energy contribution to the GL energy functional, which in turn influences the healing length of the macroscopic wave function. We apply the formalism to variationally describe vortices in a strong-coupling Fermi gas in the BEC-BCS crossover regime, in a two-band system. The healing lengths, derived as variational parameters in the vortex wave function, are shown to exhibit hidden criticality well below Tc.