Bound entangled states with nonzero distillable key rate
Quantum Physics
2015-06-26 v4
Abstract
In this paper, we present sufficient conditions for states to have positive distillable key rate. Exploiting the conditions, we show that the bound entangled states given by Horodecki et al. [Phys. Rev. Lett. 94, 160502 (2005), quant-ph/0506203] have nonzero distillable key rate, and finally exhibit a new class of bound entangled states with positive distillable key rate, but with negative Devetak-Winter lower bound of distillable key rate for the ccq states of their privacy squeezed versions.
Cite
@article{arxiv.quant-ph/0612225,
title = {Bound entangled states with nonzero distillable key rate},
author = {Dong Pyo Chi and Jeong Woon Choi and Jeong San Kim and Taewan Kim and Soojoon Lee},
journal= {arXiv preprint arXiv:quant-ph/0612225},
year = {2015}
}
Comments
7 pages, 1 figure, typos corrected, accepted for publication in PRA