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 pseudoclassical map, both qualitatively and quantitatively. Possible applications of our findings are also briefly discussed.
- Received 28 July 2011
DOI:https://doi.org/10.1103/PhysRevLett.107.234104
© 2011 American Physical Society