Quantum states representing perfectly secure bits are always distillable
量子物理
2007-11-07 v2
摘要
It is proven that recently introduced states with perfectly secure bits of cryptographic key (private states representing secure bit) [K. Horodecki et al., Phys. Rev. Lett. 94, 160502 (2005)] as well as its multipartite and higher dimension generalizations always represent distillable entanglement. The corresponding lower bounds on distillable entanglement are provided. We also present a simple alternative proof that for any bipartite quantum state entanglement cost is an upper bound on distillable cryptographic key in bipartite scenario.
引用
@article{arxiv.quant-ph/0602176,
title = {Quantum states representing perfectly secure bits are always distillable},
author = {Pawel Horodecki and Remigiusz Augusiak},
journal= {arXiv preprint arXiv:quant-ph/0602176},
year = {2007}
}
备注
RevTeX, 5 pages, published version