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Q: Fachverband Quantenoptik und Photonik

Q 34: Quanteninformation: Konzepte IV

Q 34.2: Vortrag

Mittwoch, 4. März 2009, 14:15–14:30, VMP 6 HS-D

Entanglement and permutational symmetry — •Géza Tóth^1,2,3 and Otfried Gühne^4,5 — ¹Física Teórica, Universidad del País Vasco, Apdo. 644, E-48080 Bilbao — ²Ikerbasque-Basque Foundation for Science, E-48011 Bilbao — ³Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, H-1525 Budapest — ⁴Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, A-6020 Innsbruck — ⁵Institut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck

We study entanglement and separability for permutationally symmetric quantum states. We show that for bipartite symmetric systems the most relevant entanglement criteria coincide. However, we provide a method to generate examples of bound entangled states in symmetric systems, for the bipartite and the multipartite case. These states shed some new light on the nature of bound entanglement.