Localization of Bose-Einstein condensates in optical lattices (CROSBI ID 266745)
Prilog u časopisu | ostalo | međunarodna recenzija
Podaci o odgovornosti
Franzosi, Roberto ; Giampaolo, Salvatore ; Illuminati, Fabrizio ; Livi, Roberto ; Oppo, Gian-Luca ; Politi, Antonio
engleski
Localization of Bose-Einstein condensates in optical lattices
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 dis- crete nonlinear Schrödinger equation. Several papers, addressing the study of the discrete nonlinear Schrödinger dynamics, have predicted the spontaneous generation of (classical) breathers in coupled con- densates. 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.
localization
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Podaci o izdanju
9 (5)
2011.
1248
7
objavljeno
1895-1082
10.2478/s11534-011-0035-2