The ability to efficiently realize storage and readout of optical squeezed states plays a key roll in continuous-variables quantum information processing. Here we study the quantum memory (QM) for squeezed state of propagating light in atoms based on the hybrid photon echo re-phasing (HYPER). The optical quantum state is recorded in two sublevels of the ground state of an atomic ensemble to realize long-lived QM. Taking into account the noise effect due to atomic decay, our estimation indicates that, with currently available technique, high fidelities larger than the classical fidelity threshold 81.5 % are obtainable. Our work provides some practical guidance for realization of efficient and faithful photon-echo-based memory for squeezed light.
@article{arxiv.1403.4145,
title = {Photon-echo-based quantum memory for optical squeezed states},
author = {Miao-Xin Wu and Ming-Feng Wang and Yi-Zhuang Zheng},
journal= {arXiv preprint arXiv:1403.4145},
year = {2014}
}