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- National Quantum Information Centre in GdanskPL167 papers
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17 papers · 1 filter
Knotted surfaces and equivalencies of their diagrams without triple points
Michal Jablonowski
The singularity set of a generic standard projection to the three space of a closed surface linked in four space, consists of at most three types: double points, triple points or b…
Entangled inputs cannot make imperfect quantum channels perfect
Fernando G. S. L. Brandao, Jens Eisert, Michal Horodecki +1
Entangled inputs can enhance the capacity of quantum channels, this being one of the consequences of the celebrated result showing the non-additivity of several quantities relevant…
Experimental Extraction of Secure Correlations from a Noisy Private State
Krzysztof Dobek, Michal Karpinski, Rafal Demkowicz-Dobrzanski +2
We report experimental generation of a noisy entangled four-photon state that exhibits a separation between the secure key contents and distillable entanglement, a hallmark feature…
Correlation complementarity yields Bell monogamy relations
P. Kurzynski, T. Paterek, R. Ramanathan +2
We present a method to derive Bell monogamy relations by connecting the complementarity principle with quantum non-locality. The resulting monogamy relations are stronger than thos…
Excitation temperature of C2 and broadening of the 6196A diffuse interstellar band
M. Kazmierczak, P. Gnacinski, M. R. Schmidt +3
This paper presents a finding of the correlation between the width of a strong diffuse interstellar band at 6196A and the excitation temperature of C2 based on high resolution and…
Low-dimensional quite noisy bound entanglement with cryptographic key
Łukasz Pankowski, Michał Horodecki
We provide a class of bound entangled states that have positive distillable secure key rate. The smallest state of this kind is 4 \bigotimes 4. Our class is a generalization of the…