Experimental temporal quantum steering

0468776 - FZÚ 2017 RIV GB eng J - Journal Article
Bartkiewicz, K. - Černoch, Antonín - Lemr, K. - Miranowicz, A. - Nori, F.
Experimental temporal quantum steering.
Scientific Reports. Roč. 6, Nov (2016), 1-8, č. článku 38076. ISSN 2045-2322. E-ISSN 2045-2322
R&D Projects: GA ČR GAP205/12/0382
Institutional support: RVO:68378271
Keywords : temporal quantum steering * EPR steering
Subject RIV: BH - Optics, Masers, Lasers
Impact factor: 4.259, year: 2016

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.
Permanent Link: http://hdl.handle.net/11104/0266602