Volume 90, Number 1, June 2010
|Number of page(s)||5|
|Published online||05 May 2010|
Quantum dynamics of mesoscopic driven Duffing oscillators
Department of Physics, Beijing Normal University - Beijing 100875, China
Corresponding author: firstname.lastname@example.org
Accepted: 11 March 2010
We investigate the nonlinear dynamics of a mesoscopic driven Duffing oscillator in a quantum regime. In terms of Wigner function, we identify the nature of state near the bifurcation point, and analyze the transient process which reveals two distinct stages of quenching and escape. The rate process in the escape stage allows us to extract the transition rate, which displays perfect scaling behavior with the driving distance to the bifurcation point. We numerically determine the scaling exponent, compare it with existing result, and propose open questions to be resolved.
PACS: 05.45.-a – Nonlinear dynamics and chaos / 03.65.Xp – Tunneling, traversal time, quantum Zeno dynamics / 85.25.Cp – Josephson devices
© EPLA, 2010
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