Superballistic wavepacket spreading in double kicked rotors
Superballistic wavepacket spreading in double kicked rotors
We investigate possible ways in which a quantum wavepacket spreads. We show that in a general class of double kicked rotor systems, a wavepacket may undergo superballistic spreading; i.e., its variance increases as the cubic of time. The conditions for the observed superballistic spreading and two related characteristic time scales …