Expansion dynamics of an array of high density Bose-Einstein condensates produced in a 1D CO2 laser optical lattice
Gravitation Group, Tata Institute of Fundamental Research, Mumbai, India
Corresponding author: a firstname.lastname@example.org
Published online: 20 August 2008
We discuss the expansion dynamics under mean-field repulsion of an array of 87Rb Bose-Einstein condensates produced in an all-optical scheme involving 1D lattice with nearly 105 atoms, after fast evaporative cooling of just about 1 s. Single site occupation exceeds in our experiments. The possibility of transition to two-dimensionality was also investigated. The expansion behavior of the high density multiple micro-condensates produced directly in the CO2 laser 1D optical lattice, with a lattice spacing of 5.3 μm, agrees well with a numerical simulation based on the mean-field theory.
PACS: 03.75.Kk – Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow / 37.10.De – Atom cooling methods / 37.10.Jk – Atoms in optical lattices
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008