341 citations · 3.2k across the 102 of their papers we have counts for
11 papers · 1 filter
Continuous variable cloning via network of parametric gates
G. M. D'Ariano, F. De Martini, M. F. Sacchi
We propose an experimental scheme for the cloning machine of continuous quantum variables through a network of parametric amplifiers working as input-output four-port gates.
Approximate quantum cloning and the impossibility of superluminal information transfer
D. Bruss, G. M. D'Ariano, C. Macchiavello +1
We show that nonlocality of quantum mechanics cannot lead to superluminal transmission of information, even if most general local operations are allowed, as long as they are linear…
Characterising a universal cloning machine by maximum-likelihood estimation
Massimiliano F. Sacchi
We apply a general method for the estimation of completely positive maps to the 1-to-2 universal covariant cloning machine. The method is based on the maximum-likelihood principle,…
Maximum-likelihood reconstruction of CP maps
Massimiliano F. Sacchi
We present a method for the determination of the completely positive (CP) map describing a physical device based on random preparation of the input states, random measurements at t…
Homodyne characterization of active optical media
G. M. D'Ariano, M. G. A. Paris, M. F. Sacchi
An effective maximum likelihood method is suggested to characterize the absorption/amplification properties of active optical media through homodyne detection.
Quantum cloning optimal for joint measurements
G. M. D'Ariano, M. F. Sacchi
We show that universally covariant cloning is not optimal for achieving joint measurements of noncommuting observables with minimum added noise. For such a purpose a cloning transf…