Long-Lasting Exponential Spreading in Periodically Driven Quantum Systems
Long-Lasting Exponential Spreading in Periodically Driven Quantum Systems
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 pseudoclassical map, both qualitatively and quantitatively. Possible applications of our findings are also briefly discussed.