Hannover 2016 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 33: Quantum Effects: Entanglement and Decoherence I

Q 33.4: Talk

Wednesday, March 2, 2016, 11:45–12:00, f442

Controlled generation of multipartite quantum correlations in a large spin ensemble — •Johannes Greiner, Durga Dasari, and Jörg Wrachtrup — 3. Phys. Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart

The complex behavior of many body dynamics offers new insights into the emergence of correlated clusters, spread of entanglement and in general to non-equilibrium phenomena of quantum systems. We show how color centers in diamond can be used as a testbed to study these phenomena in a well-controlled fashion. Within the central spin model comprised of the spin states of a Nitrogen-Vacancy center in diamond coupled to a spin-ensemble, we show how correlated states can be generated and analyse them using entanglement witnesses. For finite ensemble sizes these states can also be used for quantum error correction and state transport.