Phys. Rev. A 72, 011601(R) (2005) [4 pages]Nonadiabatic dynamics of a Bose-Einstein condensate in an optical lattice
We study the nonequilibrium dynamics of a Bose-Einstein condensate that is split in a harmonic trap by turning up a periodic optical lattice potential. We evaluate the dynamical evolution of the phase coherence along the lattice and the number fluctuations in individual lattice sites within the stochastic truncated Wigner approximation when several atoms occupy each site. We show that the saturation of the number squeezing at high lattice strengths, which was observed in recent experiments by Orzel et al. Science 291 2386 (2001)] can be explained by the nonadiabaticity of the splitting. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.72.011601
DOI:
10.1103/PhysRevA.72.011601
PACS:
03.75.Lm, 03.75.Gg, 03.75.Kk
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