The extraction of information from a quantum system unavoidably implies a modification of the measured system itself. In this framework partial measurements can be carried out in order to extract only a portion of the information encoded in a quantum system, at the cost of inducing a limited amount of disturbance. Here we analyze experimentally the dynamics of sequential partial measurements carried out on a quantum system, focusing on the trade-off between the maximal information extractable and the disturbance. In particular we implement two sequential measurements observing that, by exploiting an adaptive strategy, is possible to find an optimal trade-off between the two quantities.
Testing sequential quantum measurements: how can maximal knowledge be extracted? / Nagali, Eleonora; Simone, Felicetti; P. L., De Assis; D'Ambrosio, Vincenzo; Radim, Filip; Sciarrino, Fabio. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - 2:(2012), p. 443. [10.1038/srep00443]
Testing sequential quantum measurements: how can maximal knowledge be extracted?
NAGALI, ELEONORA;D'AMBROSIO, VINCENZO;SCIARRINO, Fabio
2012
Abstract
The extraction of information from a quantum system unavoidably implies a modification of the measured system itself. In this framework partial measurements can be carried out in order to extract only a portion of the information encoded in a quantum system, at the cost of inducing a limited amount of disturbance. Here we analyze experimentally the dynamics of sequential partial measurements carried out on a quantum system, focusing on the trade-off between the maximal information extractable and the disturbance. In particular we implement two sequential measurements observing that, by exploiting an adaptive strategy, is possible to find an optimal trade-off between the two quantities.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
