Quantum phase transition of condensed bosons in optical lattices

Journal Article · Wed Oct 01 00:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.68.043605· OSTI ID:20640368

Junjun, Liang; Liang, J -Q ^[1]; Liu, W -M ^[2]

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1. Institute of Theoretical Physics, Shanxi University, Taiyuan 030006 (China)
2. National Lab of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 (China)

In this paper we study the superfluid-Mott-insulator phase transition of ultracold dilute gas of bosonic atoms in an optical lattice by means of Green function method and Bogliubov transformation as well. The superfluid-Mott-insulator phase transition condition is determined by the energy-band structure with an obvious interpretation of the transition mechanism. Moreover the superfluid phase is explained explicitly from the energy spectrum derived in terms of Bogliubov approach.

• OSTI ID: 20640368
• Journal Information: Physical Review. A, Vol. 68, Issue 4; Other Information: DOI: 10.1103/PhysRevA.68.043605; (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
ATOMS
BOSE-EINSTEIN CONDENSATION
BOSONS
ENERGY GAP
ENERGY SPECTRA
EQUILIBRIUM
GREEN FUNCTION
PHASE TRANSFORMATIONS
QUANTUM MECHANICS
SUPERFLUIDITY
TRANSFORMATIONS