Exponential behavior in quantum systems is often thought to be extremely short. Using a dynamical model achievable in cold-atom experiments, we show that long-lasting exponential diffusion 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.
Long lasting exponential spreading in periodically driven quantum systems
GUARNERI, ITALO;CASATI, GIULIO;
2011-01-01
Abstract
Exponential behavior in quantum systems is often thought to be extremely short. Using a dynamical model achievable in cold-atom experiments, we show that long-lasting exponential diffusion 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.
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