Cooling mechanical motion via vacuum effect of an ensemble of quantum emitters.
Cooling mechanical motion via vacuum effect of an ensemble of quantum emitters.
复制标题
DOI：
10.1364/oe.23.030970
复制
发表时间：
2015-11
期刊：
影响因子：
3.8
通讯作者：
W. Nie;Aixi Chen;Y. Lan
中科院分区：
文献类型：
--
作者：
W. Nie;Aixi Chen;Y. Lan
我们设计了一个混合光机械装置，其中量子发射体系综通过真空相互作用与可移动的反射镜耦合。光腔与量子发射体一起被沿着驱动，因此腔场和系综之间的耦合决定了耦合系统的动力学。特别地，我们研究了真空耦合强度对可动反射镜的有效频率和有效阻尼率的影响，结果表明真空相互作用极大地提高了可动反射镜的有效阻尼率。通过计算反射镜运动过程中的有效声子数，详细分析了机械谐振器的冷却特性。结果表明，当考虑真空耦合时，在坏腔极限下，机械运动的基态冷却可以近似实现。数值计算了机械运动的冷却对腔体和量子发射体参数的依赖关系。
We design a hybrid optomechanical setup, in which an ensemble of quantum emitters is coupled with a movable mirror through vacuum interaction. The optical cavity is driven along with the quantum emitters and therefore the coupling between the cavity field and the ensemble determines the dynamics of the coupled system. In particular, we investigated the influence of the vacuum coupling strength on the effective frequency and the effective damping rate of the movable mirror, which shows that the vacuum interaction enhances greatly the effective damping rate. Further, the cooling characteristics of the mechanical resonator is analyzed in detail by counting the effective phonon number in the mirror's motion. It is found that the ground-state cooling of the mechanical motion can be approached in the bad cavity limit when the vacuum coupling is included. The dependence of the cooling of the mechanical motion on the parameters of the cavity and the quantum emitter is investigated in detail numerically.