Quantum fluctuations in one-dimensional arrays of condensates
Abstract
The effects of quantum and thermal fluctuations upon the fringe structure predicted to be observable in the momentum distribution of coupled Bose-Einstein condensates are studied by the effective-potential method. For a double-well trap, the coherence factor recently introduced by Pitaevskii and Stringari [Phys. Rev. Lett. 87, 180402 (2001)] is calculated using the effective potential approach and is found in good agreement with their result. The calculations are extended to the case of a one-dimensional array of condensates, showing that quantum effects are essentially described through a simple renormalization of the energy scale in the classical analytical expression for the fringe structure. The consequences for the experimental observability are discussed.
Keywords
Cite
@article{arxiv.cond-mat/0107387,
title = {Quantum fluctuations in one-dimensional arrays of condensates},
author = {Alessandro Cuccoli and Andrea Fubini and Valerio Tognetti and Ruggero Vaia},
journal= {arXiv preprint arXiv:cond-mat/0107387},
year = {2009}
}
Comments
RevTeX, 4 pages, 5 eps figures (published version with updated references)