Time-resolved measurement of Landau-Zener tunneling in periodic potentials
arXiv:0903.3345 · doi:10.1103/PhysRevLett.103.090403
Abstract
We report time-resolved measurements of Landau-Zener tunneling of Bose-Einstein condensates in accelerated optical lattices, clearly resolving the step-like time dependence of the band populations. Using different experimental protocols we were able to measure the tunneling probability both in the adiabatic and in the diabatic bases of the system. We also experimentally determine the contribution of the momentum width of the Bose condensates to the width of the tunneling steps and discuss the implications for measuring the jump time in the Landau-Zener problem.
5 pages, 3 figures
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