Guaranteed violation of a Bell inequality without aligned reference frames or calibrated devices.

ABSTRACT: Bell tests - the experimental demonstration of a Bell inequality violation - are central to understanding the foundations of quantum mechanics, and are a powerful diagnostic tool for the development of quantum technologies. To date, Bell tests have relied on careful calibration of measurement devices and alignment of a shared reference frame between two parties - both technically demanding tasks. We show that neither of these operations are necessary, violating Bell inequalities (i) with certainty using unaligned, but calibrated, measurement devices, and (ii) with near-certainty using uncalibrated and unaligned devices. We demonstrate generic quantum nonlocality with randomly chosen measurements on a singlet state of two photons, implemented using a reconfigurable integrated optical wavegu

SUBMITTER: Shadbolt P 

PROVIDER: S-EPMC3381803 | biostudies-literature | 2012

REPOSITORIES: biostudies-literature