Atoms in a radiofrequency-dressed optical lattice
Autor: | Lundblad, N., Lee, P. J., Spielman, I. B., Brown, B. L., Phillips, W. D., Porto, J. V. |
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Rok vydání: | 2008 |
Předmět: | |
Druh dokumentu: | Working Paper |
DOI: | 10.1103/PhysRevLett.100.150401 |
Popis: | 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. Comment: 5 pages, 4 figures |
Databáze: | arXiv |
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