103 citations · 413 across the 11 of their papers we have counts for
3 papers · 1 filter
Superbroadcasting and classical information
G. Chiribella, G. M. D'Ariano, C. Macchiavello +2
We address the problem of broadcasting N copies of a generic qubit state to M>N copies by estimating its direction and preparing a suitable output state according to the outcome of…
Economical realization of phase covariant devices in arbitrary dimensions
Francesco Buscemi, Giacomo Mauro D'Ariano, Chiara Macchiavello
We describe a unified framework of phase covariant multi user quantum transformations for d-dimensional quantum systems. We derive the optimal phase covariant cloning and transposi…
Universal and phase covariant superbroadcasting for mixed qubit states
Francesco Buscemi, Giacomo Mauro D'Ariano, Chiara Macchiavello +1
We describe a general framework to study covariant symmetric broadcasting maps for mixed qubit states. We explicitly derive the optimal N to M superbroadcasting maps, achieving opt…