Wannier-Stark states of a quantum particle in 2D lattices
M. Glueck, F. Keck, A. R. Kolovsky, H. J. Korsch
Abstract
A simple method of calculating the Wannier-Stark resonances in 2D lattices is suggested. Using this method we calculate the complex Wannier-Stark spectrum for a non-separable 2D potential realized in optical lattices and analyze its general structure. The dependence of the lifetime of Wannier-Stark states on the direction of the static field (relative to the crystallographic axis of the lattice) is briefly discussed.
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