Temporal steering is a form of temporal correlation between the initial and final state of a quantum system. It is a temporal analogue of the famous Einstein-Podolsky-Rosen (spatial) steering. We demonstrate, by measuring the photon polarization, that temporal steering allows two parties to verify if they have been interacting with the same particle, even if they have no information about what happened with the particle in between the measurements. This is the first experimental study of temporal steering. We also performed experimental tests, based on the violation of temporal steering inequalities, of the security of two quantum key distribution protocols against individual attacks. Thus, these results can lead to applications for secure quantum communications and quantum engineering.
@article{arxiv.1602.09133,
title = {Experimental temporal quantum steering},
author = {Karol Bartkiewicz and Antonín Černoch and Karel Lemr and Adam Miranowicz and Franco Nori},
journal= {arXiv preprint arXiv:1602.09133},
year = {2016}
}
Comments
9 pages, 4 figures. Our article arXiv:1503.00612v3 was extended and split into arXiv:1503.00612v4 and this article