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Control of localization and suppression of tunneling by adiabatic passage
N Sangouard1, S Guérin, M Amniat-Talab
1Laboratoire de Physique de l'Université de Bourgogne, UMR CNRS 5027, BP 47870, 21078 Dijon, France. nicolas.sangouard@u-bourgogne.fr
Abstract:
We show that a field of frequency omega combined with its second harmonic 2omega driving a double-well potential allows us to localize the wave packet by adiabatic passage, starting from the delocalized ground state. The relative phase of the fields allows us to choose the well of localization. We can suppress (and restore) the tunneling subsequently by switching on (and off) abruptly the fields at well-defined times. The mechanism relies on the fact that the dynamics is driven to an eigenstate of the Floquet Hamiltonian which is a localized state.
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