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Q: Fachverband Quantenoptik und Photonik

Q 38: Quanteneffekte (Verschränkung und Dekohärenz)

Q 38.2: Talk

Thursday, March 13, 2008, 11:30–11:45, 2D

Entanglement screening by nonlinear resonances — •Ignacio Garcia-Mata¹, Andre R. R. Carvalho², Florian Mintert^3,4,5, and Andreas Buchleitner^3,4 — ¹Laboratoire de Physique Theorique, UMR 5152 du CNRS, Universite Toulouse III — ²Department of Physics, Faculty of Science, Australian National University ACT 0200, Australia — ³Albert-Ludwigs-Universitaet Freiburg, Physikalisches Institut, Hermann-Herder-Str. 3, D-79104 Freiburg, Germany — ⁴Max-Planck-Institut fur Physik komplexer Systeme, Noethnitzerstrasse 38, D-01187, Dresden, Germany — ⁵Department of Physics, Harvard University, 17 Oxford Street, Cambridge Massachusetts, USA

We show that nonlinear resonances in a classically mixed phase space allow us to define generic, strongly entangled multipartite quantum states. The robustness of their multipartite entanglement increases with the particle number, i.e., in the semiclassical limit, for those classes of diffusive noise which assist the quantum-classical transition. Numerical results are shown for the quantum Harper map.