Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevA.85.013645
Title: Quantum phase transition of two-mode Bose-Einstein condensates with an entanglement order parameter
Authors: Fan, W.
Xu, Y.
Chen, B.
Chen, Z.
Feng, X. 
Oh, C.H. 
Issue Date: 31-Jan-2012
Citation: Fan, W., Xu, Y., Chen, B., Chen, Z., Feng, X., Oh, C.H. (2012-01-31). Quantum phase transition of two-mode Bose-Einstein condensates with an entanglement order parameter. Physical Review A - Atomic, Molecular, and Optical Physics 85 (1) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.85.013645
Abstract: The ground-state entanglement of the two-mode Bose-Einstein condensate is investigated through a quantum-phase-transition approach. The entanglement measure is taken as the order parameter and this is a nonlocal order parameter, which is different from the conventional order parameter of the Mott-insulator-superfluid-phase transitions. For this nonlocal order parameter, the scaling behavior corresponding to a continuous phase transition is obtained and a power-law divergence near the critical region follows it. This scaling behavior of quantum entanglement is analyzed by the finite-size scaling and the critical exponents are obtained as ν=1.01 and γ=0.86. A close connection between quantum fluctuations and the phase transition of entanglement is also obtained. © 2012 American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/112503
ISSN: 10502947
DOI: 10.1103/PhysRevA.85.013645
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