Stuttgart 2012 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 2: Quanteninformation: Konzepte und Methoden 1

Q 2.5: Talk

Monday, March 12, 2012, 11:30–11:45, V7.03

Purification to locally maximally entanglable states — •Tatjana Carle, Julio de Vicente, and Barbara Kraus — Institut für Theoretische Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck

We present a multipartite purification protocol for a certain class of multipartite entangled quantum states, the so-called locally maximally entanglable (LME) states. The LME states form a large class of multipartite entangled quantum states which can for example be used to encode optimally the maximal number of classical bits and which contains prominent subclasses such as stabilizer states and graph states. There exist already multipartite purification protocols for graph and stabilizer states. However, since the stabilizer of the LME states are in general non-local we had to develop new methods which go beyond the commonly used CNOT-procedure. One of the main challenges was to find protocols to access and process the non-local information contained in the states using only local operations and classical communication.