Atoms in a radiofrequency-dressed optical lattice

Details Atoms in a radiofrequency-dressed optical lattice Atoms in a radiofrequency-dressed optical lattice

2008-01-02

arxiv.org/abs/0801.0405v1

Physics

Quantum Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.100.150401

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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