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Q: Fachverband Quantenoptik und Photonik
Q 36: Quanteninformation (Konzepte und Methoden II)
Q 36.1: Talk
Thursday, March 13, 2008, 11:00–11:15, 1B
Disentanglement in qubit-qutrit systems — •Mazhar Ali1, Gernot Alber1, Kedar Ranade1, and A. R. P. Rau2 — 1Institut für Angewandte Physik, Technische Universität Darmstadt, D-64289, Germany — 2Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
The interaction of a quantum system with an environment leads to decoherence. This decoherence gradually degrades quantum entanglement. In particular, there are situations in which entanglement can vanish after some finite time. This phenomenon has been named entanglement sudden death. We examine this phenomenon induced by local spontaneous emission for 2 × 3-dimensional systems [1]. Similar to 2 × 2-dimensional systems, the negativity of quantum states can vanish in finite time. It is possible to hasten, delay or even avert this sudden death phenomenon [2].
[1] Mazhar Ali, A. R. P. Rau and K. Ranade, arXiv:quant-ph/0710.2238.
[2] A. R. P. Rau, Mazhar Ali and G. Alber, arXiv:quant-ph/0711.0317.