869 citations · 10.9k across the 170 of their papers we have counts for
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On Global Effects Caused by Locally Noneffective Unitary Operations
Sevag Gharibian, Hermann Kampermann, Dagmar Bruss
Given a bipartite quantum state rho with subsystems A and B of arbitrary dimensions, we study the entanglement detecting capabilities of locally noneffective, or cyclic, unitary op…
Unambiguous state discrimination: optimal solution and case study
M. Kleinmann, H. Kampermann, D. Bruss
We present a generic study of unambiguous discrimination between two mixed quantum states. We derive operational optimality conditions and show that the optimal measurements can be…
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…
Structural approach to unambiguous discrimination of two mixed quantum states
M. Kleinmann, H. Kampermann, D. Bruss
We analyze the optimal unambiguous discrimination of two arbitrary mixed quantum states. We show that the optimal measurement is unique and we present this optimal measurement for…