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Q: Fachverband Quantenoptik und Photonik

Q 7: Quantum Information: Concepts and Methods 1

Q 7.1: Talk

Monday, March 14, 2011, 10:30–10:45, SCH A118

Verifying W-entanglement — •Hermann Kampermann¹, Otfried Gühne², Colin Wilmott¹, and Dagmar Bruß¹ — ¹Theoretische Physik III, Universität Düsseldorf — ²Fachbereich Physik, Universität Siegen

We present a simple algorithm for finding specific decompositions of mixed density operators. The pure states in such decompositions belong to the same SLOCC entanglement class. This procedure can help to prove separability or to characterize specific types of entanglement. We use this algorithm to verify for some three qubit states W-type entanglement, i.e. states which can be written as a convex combination of pure W-states and which are genuine multipartite entangled.