Characterization of quantum processes with a faulty Bell-state analyzer
Masoud Mohseni, A. T. Rezakhani, Alexander I. Lvovsky · AIP conference proceedings · 2009
Accuracy of quantum process estimation is limited to noisy operations in the preparations and measurements devices. Such imperfections may lead to inaccuracies in the process reconstruction due to the fact that standard data analysis techniques presume ideal devices. Here, we provide a scheme for estimation of completely positive quantum maps acting on qubit systems using calibrated faulty state generator and analyzer. Specifically, we present a generalization of “Direct Characterization of Quantum Dynamics” [M. Mohseni and D. A. Lidar, 97, 170501 (2006)] with an imperfect Bell‐state analyzer.