Characterization of nonideal quantum non-demolition measurements

Philippe Grangier (1) , Jean-Michel Courty (2) , Serge Reynaud (2)

1 Laboratoire Charles Fabry de l'Institut d'Optique / Optique quantique
2 UPMC - Université Pierre et Marie Curie - Paris 6

The effectiveness of quantum non-demolition (QND) measurements must be characterized by quantities which can be determined experimentally and theoretically for nonideal QND devices. We define equivalent input noises which can conveniently be used as such quantities.

Domains: Quantum Physics [quant-ph]

Philippe Grangier, Jean-Michel Courty, Serge Reynaud. Characterization of nonideal quantum non-demolition measurements. Optics Communications, 1992, 89 (1), pp.99-106. ⟨10.1016/0030-4018(92)90254-O⟩. ⟨hal-00559019⟩