869 citations · 10.9k across the 170 of their papers we have counts for
9 papers · 1 filter
Quantum Hypergraph States
M. Rossi, M. Huber, D. Bruß +1
We introduce a class of multiqubit quantum states which generalizes graph states. These states correspond to an underlying mathematical hypergraph, i.e. a graph where edges connect…
Quantum repeaters and quantum key distribution: analysis of secret key rates
Silvestre Abruzzo, Sylvia Bratzik, Nadja K. Bernardes +3
We analyze various prominent quantum repeater protocols in the context of long-distance quantum key distribution. These protocols are the original quantum repeater proposal by Brie…
Secret key rates for coherent attacks
Markus Mertz, Hermann Kampermann, Sylvia Bratzik +1
We develop a new method to quantify the secret key rate for permutation-invariant protocols for coherent attacks and finite resources. The method reduces the calculation of secret…
Quantifying nonclassicality: global impact of local unitary evolutions
S. M. Giampaolo, A. Streltsov, W. Roga +2
We show that only those composite quantum systems possessing nonvanishing quantum correlations have the property that any nontrivial local unitary evolution changes their global st…
Determining lower bounds on a measure of multipartite entanglement from few local observables
Jun-Yi Wu, Hermann Kampermann, Dagmar Bruß +2
We introduce a method to lower bound an entropy-based measure of genuine multipartite entanglement via nonlinear entanglement witnesses. We show that some of these bounds are tight…
Scale invariance of entanglement dynamics in Grover's quantum search algorithm
M. Rossi, D. Bruß, C. Macchiavello
We calculate the amount of entanglement of the multiqubit quantum states employed in the Grover algorithm, by following its dynamics at each step of the computation. We show that g…