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- Centre National de la Recherche ScientifiqueFR208 papers
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15 papers · 2 filters
The disentangling power of unitaries
Lieven Clarisse, Sibasish Ghosh, Simone Severini +1
We define the disentangling power of a unitary operator in a similar way as the entangling power defined by Zanardi, Zalka and Faoro [PRA, 62, 030301]. A general formula is derived…
Continuous Variable Quantum Cryptography using Two-Way Quantum Communication
Stefano Pirandola, Stefano Mancini, Seth Lloyd +1
Quantum cryptography has been recently extended to continuous variable systems, e.g., the bosonic modes of the electromagnetic field. In particular, several cryptographic protocols…
Compatibility of subsystem states and convex geometry
William Hall
The subsystem compatibility problem, which concerns the question of whether a set of subsystem states are compatible with a state of the entire system, has received much study. Her…
On the quantum chromatic number of a graph
Peter J. Cameron, Ashley Montanaro, Michael W. Newman +2
We investigate the notion of quantum chromatic number of a graph, which is the minimal number of colours necessary in a protocol in which two separated provers can convince an inte…
Complementarity and Uncertainty in Mach-Zehnder Interferometry and beyond
Paul Busch, Christopher R. Shilladay
A coherent account of the connections and contrasts between the principles of com- plementarity and uncertainty is developed starting from a survey of the various formalizations of…
A generalization of boson normal ordering
Toufik Mansour, Matthias Schork, Simone Severini
In this paper we define generalizations of boson normal ordering. These are based on the number of contractions whose vertices are next to each other in the linear representation o…