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- Title
Relatively-long time decay of Loschmidt echo of a Bose-Einstein condensate in a double-well potential.
- Authors
Zheng, Q.; Wang, W. G.; Zhang, X. P.; Ren, Z.
- Abstract
We study the long-time decay of quantum Loschmidt echo (LE) of a Bose-Einstein condensate (BEC) in a double-well potential. In the tunneling and self-trapping phases of the BEC, the LE has exponential and Gaussian decays, respectively, for relatively-long times. In the crossover region, the LE behaves differently from both the tunneling and the self-trapping phases. These results indicate that relatively-long time decay of the LE is suitable for characterizing the dynamical phase transition of the BEC.
- Subjects
AVOGADRO constant; BOSE-Einstein condensation; GAUSSIAN beams; PHYSICAL constants; UNITS of measurement
- Publication
European Physical Journal D (EPJ D), 2010, Vol 58, Issue 3, p275
- ISSN
1434-6060
- Publication type
Article
- DOI
10.1140/epjd/e2010-00090-y