Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 2: Quanteninformation: Konzepte und Methoden 1

Q 2.1: Vortrag

Montag, 12. März 2012, 10:30–10:45, V7.03

Towards classification of multipartite entanglement — •Cornelia Spee, Julio de Vicente, and Barbara Kraus — Institut für Theoretische Physik, Universität Innsbruck, Austria

The investigation of the entanglement properties of multipartite systems is generally very hard due to the exponential growth of the dimension of the Hilbert space as a function of the number of constituent systems. In order to scope with these difficulties we consider on the one hand certain subsets of multipartite states and on the other hand small system sizes. In both approaches the aim is to classify multipartite entanglement and to find new applications of multipartite entangled states.

Regarding the considered subsets, we investigate the entanglement properties and applications of so-called locally maximally entanglable states (LMESs), which is a physically motivated class of multipartite states. We showed for instance that any M-state, which is relevant in the context of simulatability of quantum algorithms, can be prepared by a single one-qubit measurement on a LMES. Regarding the entanglement properties of few-qubit systems, we derived for instance a state which can be used as a universal resource for the generation of arbitrary 3-qubit states and investigated its entanglement properties.