869 citations · 10.9k across the 170 of their papers we have counts for
6 papers · 1 filter
Complementarity and correlations
Lorenzo Maccone, Dagmar Bruss, Chiara Macchiavello
We provide an interpretation of entanglement based on classical correlations between measurement outcomes of complementary properties: states that have correlations beyond a certai…
Hypergraph states in Grover's quantum search algorithm
M. Rossi, D. Bruß, C. Macchiavello
We study the entanglement content of the states employed in the Grover algorithm after the first oracle call when a few searched items are concerned. We then construct a link betwe…
Entanglement and nonclassical properties of hypergraph states
O. Gühne, M. Cuquet, F. E. S. Steinhoff +5
Hypergraph states are multi-qubit states that form a subset of the locally maximally entangleable states and a generalization of the well--established notion of graph states. Mathe…
Randomized Graph States and their Entanglement Properties
Jun-Yi Wu, Matteo Rossi, Hermann Kampermann +4
We introduce a class of mixed multiqubit states, that corresponds to a randomized version of graph states. Such states arise when a graph state is prepared with noisy or imperfect…
Optimisation of Bell inequalities with invariant Tsirelson bound
Michael Epping, Hermann Kampermann, Dagmar Bruß
We consider a subclass of bipartite CHSH-type Bell inequalities. We investigate operations, which leave their Tsirelson bound invariant, but change their classical bound. The optim…
Secret key rates for an encoded quantum repeater
Sylvia Bratzik, Hermann Kampermann, Dagmar Bruß
We investigate secret key rates for the quantum repeater using encoding [L. Jiang et al., Phys. Rev. A 79, 032325 (2009)] and compare them to the standard repeater scheme by Briege…