Energy-band structure and intrinsic coherent properties in two weakly linked Bose-Einstein condensates

Journal Article · Sun Jun 01 00:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.67.065601· OSTI ID:20639833

Li, Wei-Dong; Liang, J -Q ^[1]; Zhang, Yunbo ^[1]

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1. Department of Physics and Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, (China)

The energy-band structure and energy splitting due to quantum tunneling in two weakly linked Bose-Einstein condensates were calculated by using the instanton method. The intrinsic coherent properties of Bose-Josephson junction (BJJ) were investigated in terms of energy splitting. For E{sub C}/E{sub J}<<1, the energy splitting is small and the system is globally phase coherent. In the opposite limit, E{sub C}/E{sub J}>>1, the energy splitting is large and the system becomes phase dissipated. Our results suggest that one should investigate the coherence phenomena of BJJ in proper condition such as E{sub C}/E{sub J}{approx}1.

• OSTI ID: 20639833
• Journal Information: Physical Review. A, Vol. 67, Issue 6; Other Information: DOI: 10.1103/PhysRevA.67.065601; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BOSE-EINSTEIN CONDENSATION
ELECTRONIC STRUCTURE
INSTANTONS
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
TUNNEL EFFECT