R E Sapiro et al 2009 New J. Phys. 11 013013 doi:10.1088/1367-2630/11/1/013013
Reversible loss of superfluidity of a Bose–Einstein condensate in a 1D optical lattice
R E Sapiro1, R Zhang and G Raithel
Show affiliationsWe 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.
- PACS
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03.75.Kk Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow
- Subjects
- Dates
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Issue 1 (January 2009)
Received 18 August 2008
Published 7 January 2009
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Reversible loss of superfluidity of a Bose–Einstein condensate in a 1D optical lattice
R E Sapiro et al 2009 New J. Phys. 11 013013
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