BCS-BEC Crossover in a Two-Dimensional Fermi Gas (Articolo in rivista)

Type
Label
  • BCS-BEC Crossover in a Two-Dimensional Fermi Gas (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevLett.106.110403 (literal)
Alternative label
  • Bertaina G. [ 1,2,3 ] ; Giorgini S. [ 2,3 ] (2011)
    BCS-BEC Crossover in a Two-Dimensional Fermi Gas
    in Physical review letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Bertaina G. [ 1,2,3 ] ; Giorgini S. [ 2,3 ] (literal)
Pagina inizio
  • 110403 (literal)
Pagina fine
  • 110403 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 106 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 4 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 11 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • [ 1 ] Ecole Polytech Fed Lausanne, Inst Theoret Phys, CH-1015 Lausanne, Switzerland [ 2 ] Univ Trent, Dipartimento Fis, I-38123 Povo, Italy [ 3 ] Univ Trent, INO CNR BEC Ctr, I-38123 Povo, Italy (literal)
Titolo
  • BCS-BEC Crossover in a Two-Dimensional Fermi Gas (literal)
Abstract
  • We investigate the crossover from Bardeen-Cooper-Schrieffer (BCS) superfluidity to Bose-Einstein condensation (BEC) in a two-dimensional Fermi gas at T = 0 using the fixed-node diffusion Monte Carlo method. We calculate the equation of state and the gap parameter as a function of the interaction strength, observing large deviations compared to mean-field predictions. In the BEC regime our results show the important role of dimer-dimer and atom-dimer interaction effects that are completely neglected in the mean-field picture. Results on Tan's contact parameter associated with short-range physics are also reported along the BCS-BEC crossover. (literal)
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