Fedele, Renato (2007) Stability of two-dimensional, controlled, Bose-Einstein coherent states. [Pubblicazione in rivista scientifica]
Il contenuto (Full text) non è disponibile all'interno di questo archivio.| Tipologia del documento: | Pubblicazione in rivista scientifica |
|---|---|
| Titolo: | Stability of two-dimensional, controlled, Bose-Einstein coherent states |
| Autori: | Autore Email 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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