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9 papers · 2 filters
Classical information capacity of a class of quantum channels
M. M. Wolf, J. Eisert
We consider the additivity of the minimal output entropy and the classical information capacity of a class of quantum channels. For this class of channels the norm of the output is…
Optimizing linear optics quantum gates
J. Eisert
In this paper, the problem of finding optimal success probabilities of static linear optics quantum gates is linked to the theory of convex optimization. It is shown that by exploi…
Casimir force between designed materials: what is possible and what not
Carsten Henkel, Karl Joulain
We establish strict upper limits for the Casimir interaction between multilayered structures of arbitrary dielectric or diamagnetic materials. We discuss the appearance of differen…
Complete hierarchies of efficient approximations to problems in entanglement theory
J. Eisert, P. Hyllus, O. Guehne +1
We investigate several problems in entanglement theory from the perspective of convex optimization. This list of problems comprises (A) the decision whether a state is multi-party…
Comment on "Secure direct communication with a quantum one-time pad"
H. Hoffmann, K. Bostroem, T. Felbinger
In the paper [Phys. Rev. A \textbf{69}, 052319 (2004)], a quantum direct communication protocol is proposed which is claimed to be unconditionally secure even for the case of a noi…
Multiplicativity of maximal output purities of Gaussian channels under Gaussian inputs
A. Serafini, J. Eisert, M. M. Wolf
We address the question of the multiplicativity of the maximal p-norm output purities of bosonic Gaussian channels under Gaussian inputs. We focus on general Gaussian channels resu…