Gaussian Transformations and Distillation of Entangled Gaussian States

作者：Jaromı́r Fiurášek · 发表于：Physical Review Letters · 年份：2002 · DOI：10.1103/physrevlett.89.137904 · 被引用次数：415 · 研究领域：Quantum Information and Cryptography、Quantum Mechanics and Applications、Quantum Computing Algorithms and Architecture

We prove that it is impossible to distill more entanglement from a single copy of a two-mode bipartite entangled Gaussian state via local Gaussian operations and classical communication. More generally, we show that any hypothetical distillation protocol for Gaussian states involving only Gaussian operations would be a deterministic protocol. Finally, we argue that the protocol considered by Eisert et al. [preceding Letter, Phys. Rev. Lett. 89, 137903 ()]] is the optimum Gaussian distillation protocol for two copies of entangled Gaussian states.