Gravity-induced Wannier-Stark ladder in an optical lattice
J. Zapata, A. M. Guzman, M. G. Moore, P. Meystre
Abstract
We discuss the dynamics of ultracold atoms in an optical potential accelerated by gravity. The positions and widths of the Wannier-Stark ladder of resonances are obtained as metastable states. The metastable Wannier-Bloch states oscillate in a single band with the Bloch period. The width of the resonance gives the rate transition to the continuum.
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