Macroscopic quantum coherence in a repulsive Bose-Einstein condensate

Anno: 2003

Autori: Montina A., Arecchi F.T.

Affiliazione autori: Istituto Nazionale di Ottica Applicata, Largo E. Fermi 6, 50125 Firenze, Italy;
Department of Physics, University of Firenze, 50125 Firenze, Italy

Abstract: We consider a Bose-Einstein bicondensate of Rb-87, trapped in two different internal levels, in a situation where the density undergoes a symmetry breaking in momentum space. This occurs for a suitable number of condensed atoms within a double-well dispersion curve, obtained by Raman coupling two internal states with two tilted and detuned light fields. Evidence of bistability results from the Gross-Pitaevskii equation. By second quantization, we evaluate the tunneling rate between the two asymmetric states; the effects of losses on coherence are negligible.

Giornale/Rivista: PHYSICAL REVIEW A

Volume: 67 (2)      Da Pagina: 23616-1  A: 23616-4

Parole chiavi: SUPERPOSITION STATES; DECOHERENCE; BISTABILITY
DOI: 10.1103/PhysRevA.67.023616

Citazioni: 7
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18
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