Robust entanglement between a movable mirror and atomic ensemble and entanglement transfer in coupled optomechanical system.
Robust entanglement between a movable mirror and atomic ensemble and entanglement transfer in coupled optomechanical system.
复制标题
可移动镜子与原子系综之间的鲁棒纠缠以及耦合光机系统中的纠缠传递
DOI:
10.1038/srep33404
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发表时间:
2016-09-14
影响因子:
4.6
通讯作者:
Zhang S
中科院分区:
文献类型:
--
作者:
Bai CH;Wang DY;Wang HF;Zhu AD;Zhang S
We propose a scheme for the creation of robust entanglement between a movable mirror and atomic ensemble at the macroscopic level in coupled optomechanical system. We numerically simulate the degree of entanglement of the bipartite macroscopic entanglement and show that it depends on the coupling strength between the cavities and is robust with respect to the certain environment temperature. Inspiringly and surprisingly, according to the reported relation between the mechanical damping rate and the mechanical frequency of the movable mirror, the numerical simulation result shows that such bipartite macroscopic entanglement persists for environment temperature up to 170 K, which breaks the liquid nitrogen cooling and liquid helium cooling and largely lowers down the experiment cost. We also investigate the entanglement transfer based on this coupled system. The scheme can be used for the realization of quantum memories for continuous variable quantum information processing and quantum-limited displacement measurements.
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