Darmstadt 2008 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 38: Quanteneffekte (Verschränkung und Dekohärenz)

Q 38.3: Talk

Thursday, March 13, 2008, 11:45–12:00, 2D

Estimation of multipartite entanglement — •Florian Mintert¹, Leandro Aolita², and Andreas Buchleitner¹ — ¹Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg — ²Universidade Federal do Rio de Janeiro, Caixa Postal 68528, 21941-972 Rio de Janeiro, RJ, Brasil

We present an efficient estimation of the multipartite entanglement of mixed quantum states in terms of simple parity measurements. Similarly to the bipartite case [1] also multipartite generalizations of concurrence can be bounded by expectation values of simple parity projections on two identically prepared quantum states [2].

[1] F. Mintert and A. Buchleitner, Phys. Rev. Lett. 98, 140505 (2007)

[2] L. Aolita, A. Buchleitner and F. Mintert, quant-ph/0710.3529