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Title: Quantum phase transition in a multicomponent Bose-Einstein condensate in optical lattices

Abstract

We present a general lattice model for a multicomponent atomic Bose-Einstein system in an optical lattice. Using the model, we analytically study the quantum phase transition between the Mott insulator and a superfluid. A mean-field theory is developed from the Mott-insulator ground state. When the interspecies interactions are strong enough, the Mott insulator demonstrates the phase separation behavior. For weak interspecies interactions, the multispecies system is miscible. Finally, the phase diagram is discussed with emphasis on the role of interspecies interactions. The tip and the shape of the Mott insulator lobes do not depend on the interspecies interactions, but the latter indeed modify the position of the phase boundaries.

Authors:
;  [1]
  1. Department of Physics, University of Utah, Salt Lake City, Utah 84112 (United States)
Publication Date:
OSTI Identifier:
20634155
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 67; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevA.67.013606; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BASIC INTERACTIONS; BOSE-EINSTEIN CONDENSATION; GROUND STATES; LATTICE FIELD THEORY; MEAN-FIELD THEORY; PHASE DIAGRAMS; PHASE TRANSFORMATIONS; SHAPE; SUPERFLUIDITY

Citation Formats

Chen Guanghong, and Wu Yongshi. Quantum phase transition in a multicomponent Bose-Einstein condensate in optical lattices. United States: N. p., 2003. Web. doi:10.1103/PhysRevA.67.013606.
Chen Guanghong, & Wu Yongshi. Quantum phase transition in a multicomponent Bose-Einstein condensate in optical lattices. United States. doi:10.1103/PhysRevA.67.013606.
Chen Guanghong, and Wu Yongshi. Wed . "Quantum phase transition in a multicomponent Bose-Einstein condensate in optical lattices". United States. doi:10.1103/PhysRevA.67.013606.
@article{osti_20634155,
title = {Quantum phase transition in a multicomponent Bose-Einstein condensate in optical lattices},
author = {Chen Guanghong and Wu Yongshi},
abstractNote = {We present a general lattice model for a multicomponent atomic Bose-Einstein system in an optical lattice. Using the model, we analytically study the quantum phase transition between the Mott insulator and a superfluid. A mean-field theory is developed from the Mott-insulator ground state. When the interspecies interactions are strong enough, the Mott insulator demonstrates the phase separation behavior. For weak interspecies interactions, the multispecies system is miscible. Finally, the phase diagram is discussed with emphasis on the role of interspecies interactions. The tip and the shape of the Mott insulator lobes do not depend on the interspecies interactions, but the latter indeed modify the position of the phase boundaries.},
doi = {10.1103/PhysRevA.67.013606},
journal = {Physical Review. A},
issn = {1050-2947},
number = 1,
volume = 67,
place = {United States},
year = {2003},
month = {1}
}