Cold Atoms
Department of Molecular and Optical Physics - University of Freiburg, Germany.

Entanglement Dynamics of a Strongly Driven Trapped Atom
Maryam Roghani, Hanspeter Helm and Heinz-Peter Breuer
Institute of Physics, Albert Ludwigs University, Hermann-Herderstrasse 3, D-79104 Freiburg, Germany

Phys. Rev. Lett. 106, 040502 (2011) [4 pages]


We study the entanglement between the internal electronic and the external vibrational degrees of freedom of a trapped atom which is driven by two lasers into electromagnetically induced transparency. It is shown that basic features of the intricate entanglement dynamics can be traced to Landau-Zener splittings (avoided crossings) in the spectrum of the atom-laser field Hamiltonian. We further construct an effective Hamiltonian that describes the behavior of entanglement under dissipation induced by spontaneous emission processes. The proposed approach is applicable to a broad range of scenarios for the control of entanglement between electronic and translational degrees of freedom of trapped atoms through suitable laser fields.

©2011 The American Physical Society

DOI: 10.1103/PhysRevLett.106.040502
PACS: 03.67.Bg, 03.65.Yz, 37.10.De