Quantum calibration of measurement instrumentation.
By quantum calibration we name an experimental procedure apt to completely characterize an unknown measurement apparatus by comparing it with a few other calibrated apparatuses. Here we show how to achieve the calibration of an arbitrary measuring apparatus, by using it in combination with a tomographer in a correlation setup with an input bipartite system. The method is robust to imperfections of the tomographer, and works for practically any input state of the bipartite system.
D'Ariano
Giacomo Mauro
GM
QUIT-Quantum Information Theory Group, Dipartimento di Fisica A. Volta Università di Pavia, via A. Bassi 6, I-27100 Pavia, Italy. dariano@unipv.it
Maccone
Lorenzo
L
Lo Presti
Paoloplacido
P