Oscillations of Bose-Einstein condensates in a one-dimensional optical superlattice
- Department of Physics, National Taiwan Normal University, Taipei 11650, Taiwan (China)
Oscillations of atomic Bose-Einstein condensates in a 1D optical lattice with a two-point basis is investigated. In the low-frequency regime, four branches of modes are resolved, that correspond to the transverse in-phase and out-of-phase breathing modes, and the longitudinal acoustic and optical phonon modes of the condensates. Dispersions of these modes depend intimately on the values of two intersite Josephson tunneling strengths, J{sub 1} and J{sub 2}, and the on-site repulsion U between the atoms. Observation of these mode dispersions is thus a direct way to access them.
- OSTI ID:
- 20786391
- Journal Information:
- Physical Review. A, Vol. 72, Issue 6; Other Information: DOI: 10.1103/PhysRevA.72.065601; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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