## Induced transitions between Wannier ladders

• We study the transitions between the ground and excited Wannier states induced by a weak ac field. Because the upper Wannier states are several order of magnitude less stable than the ground states, these transitions decrease the global stability of the system characterized by the rate of probability leakage or decay rate. Using nonhermitian resonant perturbation theory we obtain an analytical expression for this induced decay rate. The analytical results are compared with exact numerical calculations of the system decay rate.

### Additional Services

Author: Markus Glück, Hankel Michael, Andrey R. Kolovsky, Hans Jürgen Korsch urn:nbn:de:hbz:386-kluedo-10101 Article English 2000 2000 Technische Universität Kaiserslautern 2000/03/10 Quantum mechanics ; Wannier-Stark systems ; decay rate ; nonhermitian perturbation theory Fachbereich Physik 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik Standard gemäß KLUEDO-Leitlinien vor dem 27.05.2011

$Rev: 13581$