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Evgueni Karpov
Researcher at Université libre de Bruxelles
Publications - 56
Citations - 1024
Evgueni Karpov is an academic researcher from Université libre de Bruxelles. The author has contributed to research in topics: Classical capacity & Amplitude damping channel. The author has an hindex of 14, co-authored 56 publications receiving 918 citations. Previous affiliations of Evgueni Karpov include Free University of Brussels & Russian Academy of Sciences.
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Quantum key distribution over 25 km with an all-fiber continuous-variable system
Jérôme Lodewyck,Matthieu R. Bloch,Raúl García-Patrón,Simon Fossier,Evgueni Karpov,Eleni Diamanti,Thierry Debuisschert,Nicolas J. Cerf,Rosa Tualle-Brouri,Steven W. McLaughlin,Philippe Grangier +10 more
TL;DR: In this paper, a reverse-reconciliated coherent-state continuous-variable quantum key distribution system is described, with which secret keys are generated at a rate of more than 2 kb/s over 25 km of optical fiber.
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Friedrichs model with virtual transitions. Exact solution and indirect spectroscopy
TL;DR: In this article, the authors considered the virtual transition from the bare vacuum state to the true vacuum state and showed that it is an irreversible process, and the relation of the result with the idea of indirect spectroscopy is discussed.
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Extending Hudson’s theorem to mixed quantum states
TL;DR: In this article, the degree of non-Gaussianity of states with positive Wigner functions with respect to the same covariance matrix has been shown to be upper and lower bounds.
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Entanglement-enhanced classical capacity of quantum communication channels with memory in arbitrary dimensions
TL;DR: It is conjecture that when entanglement gives an advantage in terms of mutual information, maximally entangled states saturate the channel capacity, as well as on the nature of the noise correlations and the parity of the space dimension.
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Causality, delocalization, and positivity of energy
Evgueni Karpov,Gonzalo Ordonez,Gonzalo Ordonez,Tomio T.Y. Petrosky,Tomio T.Y. Petrosky,Ilya Prigogine,Ilya Prigogine,G.P. Pronko +7 more
TL;DR: In this paper, the authors analyzed Hegerfeldt's theorem using quantum and classical wave packets and showed that no violation of Einstein's causality is ever involved in quantum systems with positive energy initially localized in a finite region immediately develop infinite tails.