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arXiv · 0801.0405

Atoms in a radiofrequency-dressed optical lattice

N. Lundblad·P. J. Lee·I. B. Spielman·B. L. Brown·W. D. Phillips·J. V. Porto
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Abstract

We load cold atoms into an optical lattice dramatically reshaped by radiofrequency (rf) coupling of state-dependent lattice potentials. This rf dressing changes the unit cell of the lattice at a subwavelength scale, such that its curvature and topology departs strongly from that of a simple sinusoidal lattice potential. Radiofrequency dressing has previously been performed at length scales from mm to tens of microns, but not at the single-optical-wavelength scale. At this length scale significant coupling between adiabatic potentials leads to nonadiabatic transitions, which we measure as a function of lattice depth and dressing frequency and amplitude. We also investigate the dressing by measuring changes in the momentum distribution of the dressed states.

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N. Lundblad, P. J. Lee, I. B. Spielman, B. L. Brown, W. D. Phillips, J. V. Porto. 2008-01-02. Atoms in a radiofrequency-dressed optical lattice. https://doi.org/10.1103/physrevlett.100.150401

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