Einstein-Podolsky-Rosen Entanglement between Separated Atomic Ensembles
Abstract
The Einstein-Podolsky-Rosen (EPR) entanglement is of special importance not only for fundamental research in quantum mechanics, but also for quantum information processing. Establishing EPR entanglement between two memory systems, such as atomic ensembles, nitrogen-vacancy centers, and rare-earth-ion-doped solids is promising for realizing spatial-multimode based quantum communication, quantum computation, and quantum imaging. To date, there have been few reports on realizing EPR entanglement between physical systems in true position and momentum. Here we describe successfully establishing such entanglement between two separated atomic ensembles by using quantum storage. We clearly prove the existence of EPR entanglement in position and momentum between two memories by demonstrating the satisfying of the inseparability criterion with the aid of quantum ghost-imaging and ghost-interference experiments.
Keywords
Cite
@article{arxiv.1608.04215,
title = {Einstein-Podolsky-Rosen Entanglement between Separated Atomic Ensembles},
author = {Wei Zhang and Ming-Xin Dong and Dong-Sheng Ding and Shuai Shi and Kai Wang and Shi-Long Liu and Zhi-Yuan Zhou and Guang-Can Guo and Bao-Sen Shi},
journal= {arXiv preprint arXiv:1608.04215},
year = {2019}
}