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Bound entangled Bell diagonal states of unequal local dimensions, and their witnesses
Johannes Moerland, Nikolai Wyderka, Hermann Kampermann +1
Bell diagonal states constitute a well-studied family of bipartite quantum states that arise naturally in various contexts in quantum information. In this paper we generalize the n…
Steering witnesses for unknown Gaussian quantum states
Tatiana Mihaescu, Hermann Kampermann, Aurelian Isar +1
We define and fully characterize the witnesses based on second moments detecting steering in Gaussian states by means of Gaussian measurements. All such tests, which arise from lin…
Distributed quantum incompatibility
Lucas Tendick, Hermann Kampermann, Dagmar Bruß
Incompatible, i.e. non-jointly measurable quantum measurements are a necessary resource for many information processing tasks. It is known that increasing the number of distinct me…