A temporal steering inequality
Quantum Physics
2014-08-04 v2
Abstract
Quantum steering is the ability to remotely prepare different quantum states by using entangled pairs as a resource. Very recently, the concept of steering has been quantified with the use of inequalities, leading to substantial applications in quantum information and communication science. Here, we highlight that there exists a natural temporal analogue of the steering inequality when considering measurements on a single object at different times. We give non-trivial operational meaning to violations of this temporal inequality by showing that it is connected to the security bound in the BB84 protocol and thus may have applications in quantum communication.
Cite
@article{arxiv.1310.4970,
title = {A temporal steering inequality},
author = {Yueh-Nan Chen and Che-Ming Li and Neill Lambert and Shin-Liang Chen and Yukihiro Ota and Guang-Yin Chen and Franco Nori},
journal= {arXiv preprint arXiv:1310.4970},
year = {2014}
}
Comments
8 pages, 5 figures, to appear in PRA