29 citations · 84 across the 7 of their papers we have counts for
7 papers
Optimal eavesdropping on noisy states in quantum key distribution
Z. Shadman, H. Kampermann, T. Meyer +1
We study eavesdropping in quantum key distribution with the six state protocol,when the signal states are mixed with white noise. This situation may arise either when Alice deliber…
Purifying and Reversible Physical Processes
Matthias Kleinmann, Hermann Kampermann, Tim Meyer +1
Starting from the observation that reversible processes cannot increase the purity of any input state, we study deterministic physical processes, which map a set of states to a set…
Finite key analysis for symmetric attacks in quantum key distribution
Tim Meyer, Hermann Kampermann, Matthias Kleinmann +1
We introduce a constructive method to calculate the achievable secret key rate for a generic class of quantum key distribution protocols, when only a finite number n of signals is…
Infinite qubit rings with maximal nearest neighbor entanglement: the Bethe ansatz solution
U. V. Poulsen, T. Meyer, D. Bruss +1
We search for translationally invariant states of qubits on a ring that maximize the nearest neighbor entanglement. This problem was initially studied by O'Connor and Wootters [Phy…
Physical Purification of Quantum States
M. Kleinmann, H. Kampermann, T. Meyer +1
We introduce the concept of a physical process that purifies a mixed quantum state, taken from a set of states, and investigate the conditions under which such a purification map e…
Entanglement in the Bogoliubov vacuum
U. V. Poulsen, T. Meyer, M. Lewenstein
We analyze the entanglement properties of the Bogoliubov vacuum, which is obtained as a second order approximation to the ground state of an interacting Bose--Einstein condensate.…