Volume 74, Number 5, June 2006
|Page(s)||771 - 777|
|Published online||12 April 2006|
Scattering-induced dynamical entanglement and the quantum-classical correspondence
Laboratoire de Spectrométrie physique (CNRS Unité 5588), Université Joseph-Fourier Grenoble-1 - BP 87, 38402 Saint Martin d'Hères, France
Accepted: 30 March 2006
The generation of entanglement produced by a local potential interaction in a bipartite system is investigated. The degree of entanglement is contrasted with the underlying classical dynamics for a Rydberg molecule (a charged particle colliding on a kicked top). Entanglement is seen to depend on the structure of classical phase-space rather than on the global dynamical regime. As a consequence, regular classical dynamics can in certain circumstances be associated with higher entanglement generation than chaotic dynamics. In addition, quantum effects also come into play: for example, partial revivals, which are expected to persist in the semiclassical limit, affect the long-time behaviour of the reduced linear entropy. These results suggest that entanglement may not be a pertinent universal signature of chaos.
PACS: 03.67.Mn – Entanglement production, characterization, and manipulation / 05.45.Mt – Quantum chaos; semiclassical methods / 34.60.+z – Scattering in highly excited states (e.g., Rydberg states)
© EDP Sciences, 2006
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