| Issue |
EPL
Volume 90, Number 1, June 2010
|
|
|---|---|---|
| Article Number | 10014 | |
| Number of page(s) | 6 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/90/10014 | |
| Published online | 05 May 2010 | |
Phase transition, entanglement and squeezing in a triple-well condensate
Institute of Physics “Gleb Wataghin”, University of Campinas - P. O. Box 6165, 13083-970, Campinas, SP, Brazil
Corresponding authors: viscondi@ifi.unicamp.br furuya@ifi.unicamp.br marcos@ifi.unicamp.br
Received:
2
February
2010
Accepted:
6
April
2010
We provide an in-depth characterization of a three-mode Bose-Einstein condensate trapped in a symmetric circular triple-well potential. We show how the purity related to the su(3) algebra scales for increasing number of atoms and signals the quantum phase transition between two dynamical regimes in a specific configuration. This measure, which is intrinsically related to particle entanglement, also depicts if some squeezing is occurring when we consider the system's ground state. Unlike the well-known double-well model, the triple-well model exhibits a first-order quantum phase transition, which could be investigated with the current trapping technology.
PACS: 03.75.Lm – Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations / 03.67.Mn – Entanglement measures, witnesses, and other characterizations / 64.70.Tg – Quantum phase transitions
© EPLA, 2010
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