869 citations · 10.9k across the 170 of their papers we have counts for
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Linking Quantum Discord to Entanglement in a Measurement
Alexander Streltsov, Hermann Kampermann, Dagmar Bruß
We show that a von Neumann measurement on a part of a composite quantum system unavoidably creates distillable entanglement between the measurement apparatus and the system if the…
Experimentally implementable criteria revealing substructures of genuine multipartite entanglement
Marcus Huber, Hans Schimpf, Andreas Gabriel +3
We present a general framework that reveals substructures of genuine multipartite entanglement. Via simple inequalities it is possible to discriminate different sets of multipartit…
Min-entropy and quantum key distribution: non-zero key rates for "small" numbers of signals
Sylvia Bratzik, Markus Mertz, Hermann Kampermann +1
We calculate an achievable secret key rate for quantum key distribution with a finite number of signals, by evaluating the min-entropy explicitly. The min-entropy can be expressed…
Hyperentangled mixed phased Dicke states: optical design and detection
A. Chiuri, G. Vallone, N. Bruno +3
We present an experimental method to produce 4-qubit phased Dicke states, based on a source of 2-photon hyperentangled states. By introducing quantum noise in the multipartite syst…
Multipartite entanglement in quantum algorithms
D. Bruß, C. Macchiavello
We investigate the entanglement features of the quantum states employed in quantum algorithms. In particular, we analyse the multipartite entanglement properties in the Deutsch-Joz…
Quantum Sign Permutation Polytopes
Colin Wilmott, Hermann Kampermann, Dagmar Bruss
Convex polytopes are convex hulls of point sets in the -dimensional space $\E^n$ that generalize 2-dimensional convex polygons and 3-dimensional convex polyhedra. We concentrate…
Linking a distance measure of entanglement to its convex roof
Alexander Streltsov, Hermann Kampermann, Dagmar Bruß
An important problem in quantum information theory is the quantification of entanglement in multipartite mixed quantum states. In this work, a connection between the geometric meas…
Optimal super dense coding over noisy quantum channels
Zahra Shadman, Hermann Kampermann, Chiara Macchiavello +1
We investigate super dense coding in the presence of noise, i.e. the subsystems of the entangled resource state have to pass a noisy unital quantum channel between the sender and t…