Dynamical instability and dispersion management of an attractive condensate in an optical lattice (Articolo in rivista)

Type
Label
  • Dynamical instability and dispersion management of an attractive condensate in an optical lattice (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Barontini, G; Modugno, M (2007)
    Dynamical instability and dispersion management of an attractive condensate in an optical lattice
    in Physical review. A
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Barontini, G; Modugno, M (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 76 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Florence, Dipartimento Fis, LENS, I-50019 Sesto Fiorentino, Italy; Univ Florence, Dipartimento Matemat Applicata, LENS, I-50121 Florence, Italy; Univ Trent, BEC INFM Ctr, I-38050 Trento, Italy (literal)
Titolo
  • Dynamical instability and dispersion management of an attractive condensate in an optical lattice (literal)
Abstract
  • We investigate the stability of an attractive Bose-Einstein condensate in a one-dimensional lattice in the presence of radial confinement. We find that the system is dynamically unstable for low quasimomenta and becomes stable near the band edge, in a specular fashion with respect to the repulsive case. For low interactions the instability occurs via long-wavelength excitations that produce an oscillating density pattern in both real and momentum space instead of spoiling the condensate coherence. This behavior is illustrated by simulations for the expansion of the condensate in a moving lattice. (literal)
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