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Q: Fachverband Quantenoptik und Photonik

Q 43: Quantum information: Concepts and methods II

Q 43.3: Vortrag

Donnerstag, 20. März 2014, 14:45–15:00, Kinosaal

Coherence as a Resource — •Tillmann Baumgratz, Marcus Cramer, and Martin B. Plenio — Institut für Theoretische Physik, Albert-Einstein-Allee 11, Universität Ulm, 89069 Ulm, Germany

We adopt the viewpoint of coherence as a physical resource to discuss the value of coherent states with respect to incoherent states [1]. We determine defining conditions for measures of coherence and identify classes of functionals that satisfy these conditions and other, at first glance natural quantities, that do not qualify as coherence measure. We identify a maximally coherent state and discuss its value for implementing general quantum operations when having only access to incoherent operations.

[1] T. Baumgratz, M. Cramer, and M.B. Plenio, arXiv:1311.0275.