Stuttgart 2012 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 15: Quanteneffekte: Verschränkung und Dekohärenz 1
Q 15.2: Talk
Monday, March 12, 2012, 16:45–17:00, V7.01
Tripartite nonlocality and continuous-variable entanglement in thermal states of trapped ions — Jie Li1, Thomás Fogarty2, •Cecilia Cormick3, John Goold2,4, Thomas Busch2, and Mauro Paternostro1 — 1School of Mathematics and Physics, Queen's University, Belfast BT7 1NN, United Kingdom — 2Physics Department, University College Cork, Cork, Ireland — 3Theoretische Physik, Universität des Saarlandes, D-66041 Saarbrücken, Germany — 4Clarendon Laboratory, University of Oxford, United Kingdom
We study a system of three trapped ions in an anisotropic bidimensional trap. By focusing on the transverse modes of the ions, we show that the mutual ion-ion Coulomb interactions set entanglement of a genuine tripartite nature, to some extent persistent to the thermal nature of the vibronic modes. We tackle this issue by addressing a nonlocality test in the phase space of the ionic system and quantifying the genuine residual tripartite entanglement in the continuous variable state of the transverse modes.