Quantum dispersion and its exponential growth of a wave packet in chaotic systems

Details Quantum dispersion and its exponential growth of a wave packet in chaotic systems Quantum dispersion and its exponential growth of a wave packet in chaotic systems

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002phrve..65d7203j&link_type=abstract

Physical Review E, vol. 65, Issue 4, id. 047203

Nonlinear Sciences

Chaotic Dynamics

1

Nonlinear Dynamics And Chaos, Chaotic Dynamics, Quantum Mechanics

Scientific paper

The quantum correspondence of one particular signature of classical chaos-the exponential instability of motion-can be characterized by the initial exponential growth rate of the spreading of the propagating quantum wave packet. The growth rate is approximately twice the classical maximum Lyapunov exponent of the system. In the regular case, the dispersion of the wave packet is only due to the usual quantum effect that should vanish in the classical limit. In contrast, in the chaotic case, the evolution behavior of the wave packet is due to the dynamical effect associated with the nonlinearity and persists as long as the spatial extension of the initial wave packet is kept finite.

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