---
res:
  bibo_abstract:
  - We analyze the theoretical derivation of the beyond-mean-field equation of state
    for two-dimensional gas of dilute, ultracold alkali-metal atoms in the Bardeen–Cooper–Schrieffer
    (BCS) to Bose–Einstein condensate (BEC) crossover. We show that at zero temperature
    our theory — considering Gaussian fluctuations on top of the mean-field equation
    of state — is in very good agreement with experimental data. Subsequently, we
    investigate the superfluid density at finite temperature and its renormalization
    due to the proliferation of vortex–antivortex pairs. By doing so, we determine
    the Berezinskii–Kosterlitz–Thouless (BKT) critical temperature — at which the
    renormalized superfluid density jumps to zero — as a function of the inter-atomic
    potential strength. We find that the Nelson–Kosterlitz criterion overestimates
    the BKT temperature with respect to the renormalization group equations, this
    effect being particularly relevant in the intermediate regime of the crossover.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Giacomo
      foaf_name: Bighin, Giacomo
      foaf_surname: Bighin
      foaf_workInfoHomepage: http://www.librecat.org/personId=4CA96FD4-F248-11E8-B48F-1D18A9856A87
    orcid: 0000-0001-8823-9777
  - foaf_Person:
      foaf_givenName: Luca
      foaf_name: Salasnich, Luca
      foaf_surname: Salasnich
  bibo_doi: 10.1142/S0217979218400222
  bibo_issue: '17'
  bibo_volume: 32
  dct_date: 2018^xs_gYear
  dct_identifier:
  - UT:000438217300007
  dct_language: eng
  dct_publisher: World Scientific Publishing@
  dct_title: Renormalization of the superfluid density in the two-dimensional BCS-BEC
    crossover@
...