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2011 | 9 | 5 | 1248-1254
Tytuł artykułu

Localization of Bose-Einstein condensates in optical lattices

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The dynamics of repulsive bosons condensed in an optical lattice is effectively described by the Bose-Hubbard model. The classical limit of this model, reproduces the dynamics of Bose-Einstein condensates, in a periodic potential, and in the superfluid regime. Such dynamics is governed by a discrete nonlinear Schrödinger equation. Several papers, addressing the study of the discrete nonlinear Schrödinger dynamics, have predicted the spontaneous generation of (classical) breathers in coupled condensates. In the present contribute, we shall focus on localized solutions (quantum breathers) of the full Bose-Hubbard model. We will show that solutions exponentially localized in space and periodic in time exist also in absence of randomness. Thus, this kind of states, reproduce a novel quantum localization phenomenon due to the interplay between bounded energy spectrum and non-linearity.
Wydawca

Czasopismo
Rocznik
Tom
9
Numer
5
Strony
1248-1254
Opis fizyczny
Daty
wydano
2011-10-01
online
2011-09-15
Twórcy
autor
  • Dipartimento di Fisica, Università di Firenze and INFN, Sez. di Firenze, Via G. Sansone 1, Sesto Fiorentino, I-50019, Italy
  • Department of Physics, University of Strathclyde, 107 Rottenrow, Glasgow, G4 ONG, Scotland, UK
  • Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Via Madonna del Piano 10, Sesto Fiorentino, I-50019, Italy
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11534-011-0035-2
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