| Issue |
Europhys. Lett.
Volume 54, Number 1, April 2001
|
|
|---|---|---|
| Page(s) | 14 - 20 | |
| Section | General | |
| DOI | https://doi.org/10.1209/epl/i2001-00222-0 | |
| Published online | 01 December 2003 | |
Non-Markovian spectral broadening in interacting continuous-wave atom lasers
1
Albert-Ludwigs-Universität, Fakultät für Physik
Hermann-Herder Straße 3, Freiburg im Breisgau, D-79104
Germany
2
Istituto Italiano per gli Studi Filosofici, Palazzo Serra di Cassano
Via Monte di Dio 14, 80132 Napoli, Italy
Received:
13
October
2000
Accepted:
26
January
2001
The non-Markovian dynamics of a continuous-wave atom laser model is studied which includes gravitational effects and interactions inside the Bose-Einstein condensate. With the help of the time-convolutionless projection operator technique both the occupation number of the condensate and the spectrum of the atoms coupled out of the condensate are determined. A correct modeling of memory effects in the atom laser requires a generalization of the projection operator technique which takes into account correlations in the initial state of the combined atom-reservoir system. The non-Markovian evolution is shown to yield substantial deviations from results obtained in the Born-Markov approximation.
PACS: 03.75.Fi – Phase coherent atomic ensembles; quantum condensation phenomena / 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps / 02.70.Rr – General statistical methods
© EDP Sciences, 2001
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