Long-lasting Exponential Spreading in Periodically Driven Quantum Systems
arXiv:1201.2493 · doi:10.1103/PhysRevLett.107.234104
Abstract
Using a dynamical model relevant to cold-atom experiments, we show that long-lasting exponential spreading of wave packets in momentum space is possible. Numerical results are explained via a pseudo-classical map, both qualitatively and quantitatively. Possible applications of our findings are also briefly discussed.
4 figures, 6 pages (including supplementary material), published in the 2nd of December, 2011 issue of PRL
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