Long-time fidelity and chaos for a kicked nonlinear oscillator system
arXiv:0905.4646 · doi:10.1016/j.physleta.2009.02.022
Abstract
We deal with a system comprising a nonlinear (Kerr-like) oscillator excited by a series of ultra-short external pulses. We introduce the fidelity-based entropic parameter that can be used as an indicator of quantum chaos. Moreover, we propose to use the fidelity-like parameter comprising the information about the mean number of photons in the system. We shall concentrate on the long-time behaviour of the parameters discussed, showing that for deep chaos cases the quantum fidelities behave chaotically in the classical sense despite their strictly quantum character.
20 pages including 8 figures
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- Entanglement dynamics and ergodicity breaking in a quantum cellular automaton