Gravity-induced Wannier-Stark ladder in an optical lattice
arXiv:cond-mat/0009185 · doi:10.1103/PhysRevA.63.023607
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.
5 pages + 8 eps figures, submitted to Phys. Rev. A