Dresden 2011 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 50: Quantum Effects: Entanglement and Decoherence

Q 50.6: Vortrag

Donnerstag, 17. März 2011, 11:45–12:00, SCH A01

Entanglement Control with Measures Optimized on the Fly — •Mark Girard and Florian Mintert — Freiburg Institute of Advanced Studies, Albert-Ludwigs-Universität Freiburg, Albertstraße 19, 79104 Freiburg

We develop optimal time-dependent control fields that drive many-body quantum systems into states that maximize genuine multipartite entanglement. We build on techniques [1] to derive such control fields that have recently been derived to optimize entanglement as characterized by an approximate entanglement measure. This quantity, however, cannot accurately recognize genuine multipartite entanglement. To overcome this, we employ a recently derived criterion [2] to identify genuine many-body entanglement. Similar to typical entanglement measures, its evaluation requires an optimization. Thus we have two optimizations to solve, one for the control fields and one for the separability criterion. We investigate how both of these can be addressed simultaneously with the same techniques.

[1]Felix Platzer, Florian Mintert and Andreas Buchleitner, Phys. Rev. Lett., 105, 020501 (2010)

[2]Marcus Huber, Florian Mintert, and Andreas Gabriel, Beatrix Hiesmayr, Phys. Rev. Lett., 104, 210501 (2010)