Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 56: Quantum Information (Coherence and Entanglement)

Q 56.3: Talk

Thursday, March 8, 2018, 11:00–11:15, K 1.019

A resource theory of quantum process coherence — •Felix Bischof, Hermann Kampermann, and Dagmar Bruß — Institut für Theoretische Physik III, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany

The coherent superposition of states is one of the fundamental features of quantum mechanics that distinguish it from the classical realm. In particular, virtually any quantum information protocol requires coherence in order to achieve a quantum advantage. Recently, coherence has received renewed attention in the context of a resource theory [1], in which coherence is a valuable resource that, due to restrictions on operations, can only be processed but not generated. In this context, coherence-free states, coherence-nonincreasing operations, and coherence measures are defined with respect to a fixed quantum state basis. We investigate a generalization of the concept of coherence with respect to general quantum processes. In particular, we argue how the ingredients of a generalized resource theory of coherence can be obtained.

[1] A. Streltsov, G. Adesso, and M. B. Plenio, Rev. Mod. Phys. 89, 041003 (2017)