Luther-Emery phase and atomic-density waves in a trapped fermion gas (Articolo in rivista)

Type
Label
  • Luther-Emery phase and atomic-density waves in a trapped fermion gas (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Gao, XL; Rizzi, M; Polini, M; Fazio, R; Tosi, MP; Campo, VL; Capelle, K (2007)
    Luther-Emery phase and atomic-density waves in a trapped fermion gas
    in Physical review letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Gao, XL; Rizzi, M; Polini, M; Fazio, R; Tosi, MP; Campo, VL; Capelle, K (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 98 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR, INFM, NEST, I-56126 Pisa, Italy; Scuola Normale Super Pisa, I-56126 Pisa, Italy; SISSA, Sch Adv Int Studies, I-34014 Trieste, Italy; Univ Brasilia, Ctr Int Fis Mat Condensada, BR-70919970 Brasilia, DF, Brazil; Univ Sao Paulo, Inst Fis Sao Carlos, Dept Fis & Informat, BR-13560970 Sao Carlos, SP, Brazil (literal)
Titolo
  • Luther-Emery phase and atomic-density waves in a trapped fermion gas (literal)
Abstract
  • The Luther-Emery liquid is a state of matter that is predicted to occur in one-dimensional systems of interacting fermions and is characterized by a gapless charge spectrum and a gapped spin spectrum. In this Letter we discuss a realization of the Luther-Emery phase in a trapped cold-atom gas. We study by means of the density-matrix renormalization-group technique a two-component atomic Fermi gas with attractive interactions subject to parabolic trapping inside an optical lattice. We demonstrate how this system exhibits compound phases characterized by the coexistence of spin pairing and atomic-density waves. A smooth crossover occurs with increasing magnitude of the atom-atom attraction to a state in which tightly bound spin-singlet dimers occupy the center of the trap. The existence of atomic-density waves could be detected in the elastic contribution to the light-scattering diffraction pattern. (literal)
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