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- University of GdańskPL161 papers
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18 papers · 2 filters
From unextendible product bases to genuinely entangled subspaces
Maciej Demianowicz, Remigiusz Augusiak
Unextendible product bases (UPBs) are interesting mathematical objects arising in composite Hilbert spaces that have found various applications in quantum information theory, for i…
A No-go theorem for device-independent security in relativistic causal theories
Roberto Salazar, Michał Kamon, Dardo Goyeneche +4
A crucial task for secure communication networks is to determine the minimum of physical requirements to certify a cryptographic protocol. A widely accepted candidate for certifica…
System information propagation for spin structures
Piotr Mironowicz, Paweł Należyty, Paweł Horodecki +1
We study in details decoherence process of a spin register, coupled to a spin environment. We use recently developed methods of information transfer study in open quantum systems t…
Activation of entanglement from quantum coherence and superposition
Lu-Feng Qiao, Jun Gao, Alexander Streltsov +11
Quantum entanglement and coherence are two fundamental features of nature, arising from the superposition principle of quantum mechanics. While considered as puzzling phenomena in…
A loophole of all `loophole-free' Bell-type theorems
Marek Czachor
Bell's theorem cannot be proved if complementary measurements have to be represented by random variables which cannot be added or multiplied. One such case occurs if their domains…
Redundant information encoding in QED during decoherence
Jan Tuziemski, Piotr Witas, Jarosław K. Korbicz
Decoherence processes in quantum electrodynamics due to neglecting either the radiation [L. Landau, Z. Phys. 45, 430 (1927)] or the charged matter [N. Bohr and L. Rosenfeld, K. dan…