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- National Quantum Information Centre in GdanskPL167 papers
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19 papers · 1 filter
Universal Quantum Estimator
Artur K. Ekert, Carolina Moura Alves, Daniel K. L. Oi +3
We present a simple device based on the controlled-SWAP gate that performs quantum state tomography. It can also be used to determine maximum and minimum eigenvalues, expectation v…
A Thermodynamical Approach to Quantifying Quantum Correlations
Jonathan Oppenheim, Michal Horodecki, Pawel Horodecki +1
We consider the amount of work which can be extracted from a heat bath using a bipartite state shared by two parties. In general it is less then the amount of work extractable when…
Strongly meager sets can be quite big
Tomek Bartoszynski, Andrzej Nowik, Tomasz Weiss
The paper contains two results pointing to the lack of symmetry between measure and category. Assume CH. There exists a strongly meager subset of the Cantor set that can be mapped…
On local indistinguishability of orthogonal pure states by using a bound on distillable entanglement
Sibasish Ghosh, Guruprasad Kar, Anirban Roy +3
We show that the four states a|00>+b|11>, b^*|00>-a^*|11>, c|01>+d|10> and d^*|01>-c^*|10> cannot be discriminated with certainty if only local operations and classical communicati…
Do all pure entangled states violate Bell's inequalities for correlation functions?
Marek Zukowski, Caslav Brukner, Wieslaw Laskowski +1
Any pure entangled state of two particles violates a Bell inequality for two-particle correlation functions (Gisin's theorem). We show that there exist pure entangled N>2 qubit sta…
Greenberger-Horne-Zeilinger paradoxes for N quNits
Dagomir Kaszlikowski, Marek Zukowski
In this paper we show the series of Greenberger-Horne-Zeilinger paradoxes for N maximally entangled N-dimensional quantum systems.