利用主动的装置来获得明亮的多体连续变量纠缠已有探讨，但是多局限于两体或者三体连续变量纠缠。本项目建议一种基于多重EIT的主动装置来获得明亮的多体连续变量纠缠光源。由于EIT系统具有长时的基态相干，强的非线性极化率，以及可以忽略的自发辐射等优势，并且在该装置中光模被操纵在阈值以上，可以同时获得激光振荡和多模光的纠缠，所以在实验操作上也具有现实的意义。项目的研究内容主要有两个方面：第一，探讨在传统的多重EIT系统中产生集合模的纠缠、纠缠的纠缠等多体连续变量纠缠的可能性；第二，考虑在相位依赖的多重EIT系统中产生图态纠缠以及复杂的量子纠缠网络的可行性。

Although the generation of the bright multipartite continuous variable (CV) entanglement in an active device has been discussed, it is mostly confined to the bipartite or tripartite entanglement. There a scheme on the generation of bright CV entanglement based on multiple EIT in an active device has been suggested. This may have some advantages for the EIT system in which long-time ground state coherence, large nonliner susceptibility and negligibile spontaneous emission have been displayed. At the same time the light modes are controlled above the threshold, so the laser oscillation and entangled light can be both obtained. Based on this, the scheme is realizable in the experimental operation. The content of the project includes the following two aspects: first, we discuss the feasibility of the collective mode entanglement, entangled entanglement in the traditional multiple EIT system; second, we consider the possibility of the generation of graph-state entanglment and complex quantum entanglement network in the phase-dependent EIT system.