TY - JOUR
T1 - Oscillations of Bose-Einstein condensates in a one-dimensional optical superlattice
AU - Huang, Chou Chun
AU - Wu, Wen Chin
PY - 2005/12
Y1 - 2005/12
N2 - 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, J1 and J2, and the on-site repulsion U between the atoms. Observation of these mode dispersions is thus a direct way to access them.
AB - 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, J1 and J2, and the on-site repulsion U between the atoms. Observation of these mode dispersions is thus a direct way to access them.
UR - http://www.scopus.com/inward/record.url?scp=28844434633&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=28844434633&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.72.065601
DO - 10.1103/PhysRevA.72.065601
M3 - Article
AN - SCOPUS:28844434633
SN - 1050-2947
VL - 72
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 6
M1 - 065601
ER -