Characterizing Quantum Properties of a Measurement Apparatus: Insights from the Retrodictive Approach
Résumé
Using the retrodictive approach of quantum physics, we show that the pre-measurement state retrodicted from the response of a measurement apparatus is a convenient tool to characterize its quantum properties. We propose a procedure for realizing the tomography of this state for any measurement apparatus. We then translate in terms of this state some interesting aspects of the quantum behavior of a detector, such as the projectivity, the ideality, the non-classicality or the non-gaussian character of its measurements. These properties are crucial in several quantum protocols, in particular in conditional preparation of non-classical states of light or measurement-driven quantum information processing.
Domaines
Physique Quantique [quant-ph]
Origine : Fichiers produits par l'(les) auteur(s)