627 citations · 11.1k across the 229 of their papers we have counts for
11 papers · 2 filters
Maximum-likelihood estimation of the density matrix
K. Banaszek, G. M. D'Ariano, M. G. A. Paris +1
We present a universal technique for quantum state estimation based on the maximum-likelihood method. This approach provides a positive definite estimate for the density matrix fro…
Phase covariant quantum cloning
D. Bruss, M. Cinchetti, G. M. D'Ariano +1
We consider an N -> M quantum cloning transformation acting on pure two-level states lying on the equator of the Bloch sphere. An upper bound for its fidelity is presented, by esta…
Feedback-assisted measurement of the free mass position under the Standard Quantum Limit
G. M. D'Ariano, M. F. Sacchi, R. Seno
The Standard Quantum Limit (SQL) for the measurement of a free mass position is illustrated, along with two necessary conditions for breaching it. A measurement scheme that overcom…
Universal teleportation with a twist
Samuel L. Braunstein, Giacomo M. D'Ariano, G. J. Milburn +1
We give a transfer theorem for teleportation based on twisting the entanglement measurement. This allows one to say what local unitary operation must be performed to complete the t…
Tomographic test of Bell's inequality
G. M. D'Ariano, L. Maccone, M. F. Sacchi +1
We present a homodyne detection scheme to verify Bell's inequality on correlated optical beams at the output of a nondegenerate parametric amplifier. Our approach is based on tomog…
On the correspondence between classical and quantum measurements on a bosonic field
G. M. D'Ariano, M. F. Sacchi, H. P. Yuen
We study the correspondence between classical and quantum measurements on a harmonic oscillator that describes a one-mode bosonic field. We connect the quantum measurement of an ob…