62 citations · 175 across the 5 of their papers we have counts for
5 papers
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…
Quantum repeaters and quantum key distribution: the impact of entanglement distillation on the secret key rate
Sylvia Bratzik, Silvestre Abruzzo, Hermann Kampermann +1
We investigate quantum repeaters in the context of quantum key distribution. We optimize the secret key rate per memory per second with respect to different distillation protocols…
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…
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…