Andreas Winter

TL;DR: In this article, the authors consider the problem of distilling pure coherence from a single instance of a given resource state and show that the amount of distillable coherence is essentially the same for IO, DIO, and MIO, despite the fact that the three classes of operations are very different.

TL;DR: In this paper, the authors introduced the concept of approximate degradable channels, which satisfy the condition that a degrading channel can be obtained from the channel by applying a degrading degrading channel.

TL;DR: In this article, a cryptographic protocol for generating a distributed secret key from correlations that violate a Bell inequality by a sufficient amount, and prove its security against eavesdroppers, constrained only by the assumption that any information accessible to them must be compatible with the nonsignaling principle.

TL;DR: In this article, it was shown that unitary 2-designs can be implemented by alternately repeating random unitaries diagonal in the Pauli-Z basis and Pauli X basis.

TL;DR: The view is that the operational foundation of coherence in a state, be it quantum or otherwise wave mechanical, lies in the observation of interference effects, and the approach here is to consider an idealized multi-path interferometer, with a suitable detector, in such a way that the visibility of the interference pattern provides a quantitative expression of the amount of coherent in a given probe state.