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Phys. Rev. A 80, 053619 (2009) [4 pages]

Interaction-induced dynamical phase locking of Bose-Einstein condensates

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Erez Boukobza1, Doron Cohen2, and Amichay Vardi1,3
1Department of Chemistry, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
2Department of Physics, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
3ITAMP, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA

Received 18 July 2009; published 19 November 2009

We show that interactions result in the emergence of a definite relative phase between two initially incoherent Bose-Einstein condensates. The many-realization interference fringe visibility is universal at g12(1)∼1/3 throughout the Josephson interaction regime as evident from a semiclassical picture. Other types of incoherent preparation yield qualitatively different coherence dynamics.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.80.053619
DOI:
10.1103/PhysRevA.80.053619
PACS:
03.75.Lm, 03.75.Dg, 42.50.Xa