Stuttgart 2012 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 35: Poster 2
Q 35.41: Poster
Mittwoch, 14. März 2012, 16:30–19:00, Poster.I+II
Lower Bounds on a Genuine Multipartite Entanglement Measure — •Junyi Wu1, Marcus Huber2, Hermann Kampermann1, and Dagmar Bruss1 — 1Institute for Theoretical Physics III, Heinrich-Heine-University Düsseldorf, Germany — 2Faculty of Physics, University of Vienna
In [1] a genuine multipartite entanglement measure based on the definition of concurrence was introduced. A lower bound of this measure was calculated via a relation to a nonlinear entanglement witness [2]. This bound depends therefore on the type of state that one considers. By using the witnesses introduced in [3], we provide new lower bounds and extend the approach of [1] to a wide range of states (in particular, Dicke states).
[1] Z.Ma, Z.Chen, Z.Chen, C.Spengler, A.Gabriel, and M.Huber, Phys. Rev. A 83, 062325 (2011).
[2] M.Huber, F.Mintert, A.Gabriel, and B.C.Hiesmayr, Phys. Rev. Lett. 104, 210501 (2010).
[3] M.Huber, P.Erker, H.Schimpf, A.Gabriel, and B.C.Hiesmayr, Phys. Rev. A 83, 040301(R) (2011)