Fedele, Renato (2007) Stability of two-dimensional, controlled, Bose-Einstein coherent states. [Pubblicazione in rivista scientifica]

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Tipologia del documento: Pubblicazione in rivista scientifica
Titolo: Stability of two-dimensional, controlled, Bose-Einstein coherent states
Autori:
AutoreEmail
Fedele, Renato[non definito]
Autore/i: D. Jovanovic, R. Fedele
Data: 2007
Numero di pagine: 6
Dipartimento: Scienze fisiche
Numero identificativo: 10.1140/epjb/e2007-00361-6
URL ufficiale: http://www.springerlink.com/content/e17rx475p61343...
Titolo del periodico: THE EUROPEAN PHYSICAL JOURNAL. B, CONDENSED MATTER PHYSICS
Data: 2007
Volume: 60
Numero: 3
Intervallo di pagine: pp. 363-368
Numero di pagine: 6
Parole chiave: Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations, Solitons, Boson systems, Controlling Potential Method
Numero identificativo: 10.1140/epjb/e2007-00361-6
Depositato il: 20 Ott 2010 08:34
Ultima modifica: 30 Apr 2014 19:42
URI: http://www.fedoa.unina.it/id/eprint/6689

Abstract

Two-dimensional stability of a controlled Bose-Einstein condensation state, in the form of a nonlinear Schrödinger soliton [JETP Lett. 80 535 (2004)], is studied for the condensations with both repulsive and attractive inter-atom interactions. The Gross-Pitaevski equation is solved numerically, taking initialy a controlled soliton whose “effective mass” is several times bigger than the critical value for a weak collapse in the absence of a potential well, and allowing for reasonably large errors in the experimental realization of the trapping potential required by the theory. For repulsive and sufficiently weak attractive interactions, the controlled state is shown to remain stable inside a breathing potential well, for a time that is an order of magnitude longer than the characteristic periods of the forced and eigenoscillations of the soliton. The collapse is observed only for attractive interactions, when the nonlinear attraction exceeded the appropriate threshold.

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