Quantum steering of Gaussian states via non-Gaussian measurements.

ABSTRACT: Quantum steering-a strong correlation to be verified even when one party or its measuring device is fully untrusted-not only provides a profound insight into quantum physics but also offers a crucial basis for practical applications. For continuous-variable (CV) systems, Gaussian states among others have been extensively studied, however, mostly confined to Gaussian measurements. While the fulfilment of Gaussian criterion is sufficient to detect CV steering, whether it is also necessary for Gaussian states is a question of fundamental importance in many contexts. This critically questions the validity of characterizations established only under Gaussian measurements like the quantification of steering and the monogamy relations. Here, we introduce a formalism based on local uncertainty rel

SUBMITTER: Ji SW 

PROVIDER: S-EPMC4944338 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature