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.
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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
期刊:
影响因子:
4.6
通讯作者:
Zhang S
Zhang S
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Bai CH;Wang DY;Wang HF;Zhu AD;Zhang S

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我们提出了一种在耦合光机系统中在宏观层面上在可移动镜子和原子系综之间创建鲁棒纠缠的方案。我们对二分宏观纠缠的纠缠程度进行了数值模拟,并表明它取决于空腔之间的耦合强度,并且对于特定的环境温度具有鲁棒性。令人鼓舞和惊讶的是,根据报道的机械阻尼率与可动镜机械频率之间的关系,数值模拟结果表明,这种二分宏观纠缠在环境温度高达170 K的情况下仍然存在,打破了液氮冷却和液氦冷却,大大降低了实验成本。我们还研究了基于该耦合系统的纠缠传输。该方案可用于实现连续可变量子信息处理和量子极限位移测量的量子存储器。
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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