Purity oscillations in Bose-Einstein condensates with balanced gain and loss
Quantum Physics
2016-03-23 v2 Quantum Gases
Abstract
In this work we present a new generic feature of PT-symmetric Bose-Einstein condensates by studying the many-particle description of a two-mode condensate with balanced gain and loss. This is achieved using a master equation in Lindblad form whose mean-field limit is a PT-symmetric Gross-Pitaevskii equation. It is shown that the purity of the condensate periodically drops to small values but then is nearly completely restored. This has a direct impact on the average contrast in interference experiments which cannot be covered by the mean-field approximation, in which a completely pure condensate is assumed.
Cite
@article{arxiv.1509.05656,
title = {Purity oscillations in Bose-Einstein condensates with balanced gain and loss},
author = {Dennis Dast and Daniel Haag and Holger Cartarius and Günter Wunner},
journal= {arXiv preprint arXiv:1509.05656},
year = {2016}
}
Comments
4 pages, 3 figures, additions in the text, to be published in Phys. Rev. A