220 citations · 394 across the 10 of their papers we have counts for
9 papers · 1 filter
Spin chain model for correlated quantum channels
Davide Rossini, Vittorio Giovannetti, Simone Montangero
We analyze the quality of the quantum information transmission along a correlated quantum channel by studying the average fidelity between input and output states and the average o…
Qubit channels with small correlations
Filippo Caruso, Vittorio Giovannetti, Chiara Macchiavello +1
We introduce a class of quantum channels with correlations acting on pairs of qubits, where the correlation takes the form of a shift operator onto a maximally entangled state. We…
A new approach to characterize qubit channels
Filippo Caruso, Vittorio Giovannetti
We analyze qubit channels by exploiting the possibility of representing two-level quantum systems in terms of characteristic functions. To do so, we use functions of non-commuting…
Quantum Shared Broadcasting
V. Giovannetti, A. S. Holevo
A generalization of quantum broadcasting protocol is presented. Here the goal is to copy an unknown input state into two subsystems which partially overlap. We show that the possib…
A Protocol For Cooling and Controlling Composite Systems by Local Interactions
Daniel Burgarth, Vittorio Giovannetti
We discuss an explicit protocol which allows one to externally cool and control a composite system by operating on a small subset of it. The scheme permits to transfer arbitrary an…
Mediated Homogenization
Daniel Burgarth, Vittorio Giovannetti
Homogenization protocols model the quantum mechanical evolution of a system to a fixed state independently from its initial configuration by repeatedly coupling it with a collectio…