Macroscopic quantum coherence in a repulsive Bose-Einstein condensate
Journal Article
·
· Physical Review. A
- Istituto Nazionale di Ottica Applicata, Dipartimento di Fisica, Universita di Firenze, Largo Enrico Fermi 6, 50125 Florence (Italy)
We consider a Bose-Einstein bicondensate of {sup 87}Rb, 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.
- OSTI ID:
- 20633757
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 67; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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