103 citations · 283 across the 5 of their papers we have counts for
8 papers
Robustness of a quantum key distribution with two and three mutually unbiased bases
Filippo Caruso, Helle Bechmann-Pasquinucci, Chiara Macchiavello
We study the robustness of various protocols for quantum key distribution. We first consider the case of qutrits and study quantum protocols that employ two and three mutually unbi…
Impossibility of perfect quantum sealing of classical information
H. Bechmann-Pasquinucci, G. M. D'Ariano, C. Macchiavello
Sealing information means making it publicly available, but with the possibility of knowing if it has been read. Commenting on [1], we will show that perfect quantum sealing is not…
Quantum entanglement enhances the capacity of bosonic channels with memory
Nicolas J. Cerf, Julien Clavareau, Chiara Macchiavello +1
The bosonic quantum channels have recently attracted a growing interest, motivated by the hope that they open a tractable approach to the generally hard problem of evaluating quant…
Economical Phase-Covariant Cloning of Qudits
Francesco Buscemi, Giacomo Mauro D'Ariano, Chiara Macchiavello
We derive the optimal N to M phase-covariant quantum cloning for equatorial states in dimension d with M=kd+N, k integer. The cloning maps are optimal for both global and single-qu…
Entangled states maximize the two qubit channel capacity for some Pauli channels with memory
C. Macchiavello, G. M. Palma, S. Virmani
We prove that a general upper bound on the maximal mutual information of quantum channels is saturated in the case of Pauli channels with an arbitrary degree of memory. For a subse…
Against Quantum Noise
A. Ekert, C. Macchiavello
This is a brief description of how to protect quantum states from dissipation and decoherence that arise due to uncontrolled interactions with the environment. We discuss recoheren…