627 citations · 11.1k across the 229 of their papers we have counts for
11 papers · 2 filters
Informationally complete measurements and groups representation
G. M. D'Ariano, P. Perinotti, M. F. Sacchi
Informationally complete measurements on a quantum system allow to estimate the expectation value of any arbitrary operator by just averaging functions of the experimental outcomes…
There exist non orthogonal quantum measurements that are perfectly repeatable
F. Buscemi, G. M. D'Ariano, P. Perinotti
We show that, contrarily to the widespread belief, in quantum mechanics repeatable measurements are not necessarily described by orthogonal projectors--the customary paradigm of "o…
Extremal covariant quantum operations and POVM's
Giacomo Mauro D'Ariano
We consider the convex sets of QO's (quantum operations) and POVM's (positive operator valued measures) which are covariant under a general finite-dimensional unitary representatio…
Optimization of quantum universal detectors
G. M. D'Ariano, P. Perinotti, M. F. Sacchi
The expectation value <O> of an arbitrary operator O can be obtained via a universal measuring apparatus that is independent of O, by changing only the data-processing of the outco…
Experimental Detection of Entanglement with Polarized Photons
M. Barbieri, F. De Martini, G. Di Nepi +3
We report on the first experimental realization of the entanglement witness for polarization entangled photons. It represents a recently discovered significant quantum information…
Quantum universal detectors
G. M. D'Ariano, P. Perinotti, M. F. Sacchi
We address the problem of estimating the expectation value <O> of an arbitrary operator O via a universal measuring apparatus that is independent of O, and for which the expectatio…