Reversible loss of superfluidity of a Bose-Einstein condensate in a 1D optical lattice

Details Reversible loss of superfluidity of a Bose-Einstein condensate in a 1D optical lattice Reversible loss of superfluidity of a Bose-Einstein condensate in a 1D optical lattice

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009njph...11a3013s&link_type=abstract

New Journal of Physics, Volume 11, Issue 1, pp. 013013 (2009).

Physics

4

Scientific paper

We apply a one-dimensional (1D) optical lattice, formed by two laser beams with a wavelength of 852 nm, to a 3D 87Rb Bose-Einstein condensate (BEC) in a shallow magnetic trap. We use Kapitza-Dirac scattering to determine the depth of the optical lattice. A qualitative change in behavior of the BEC is observed at a lattice depth of 30Erec, where the quantum gas undergoes a reversible transition from a superfluid state to a state that lacks well-to-well phase coherence. Our observations are consistent with a 1D Mott insulator transition, but could also be explained by mean-field effects.

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