In recent development of quantum technologies, a frequency conversion of quantum signals has been studied widely. We investigate the optic-microwave entanglement that is generated by applying an electro-optomechanical frequency conversion scheme to one mode in an optical two-mode squeezed vacuum state. We quantify entanglement of the converted two-mode Gaussian state, where surviving entanglement of the state is analyzed with respect to the parameters of the electro-optomechanical system. Furthermore, we show that there exists an upper bound for the entanglement that survives after the conversion of highly entangled optical states. Our study provides a theoretical platform for a practical quantum illumination system.
@article{arxiv.2101.02508,
title = {Surviving Entanglement in Optic-Microwave Conversion by Electro-Optomechanical System},
author = {Yonggi Jo and Su-Yong Lee and Yong Sup Ihn and Dongkyu Kim and Zaeill Kim and Duk Y. Kim},
journal= {arXiv preprint arXiv:2101.02508},
year = {2021}
}