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首页> 外文期刊>Quantum Engineering >Quantum ground state cooling of translational and librational modes of an optically trapped nanoparticle coupling cavity
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Quantum ground state cooling of translational and librational modes of an optically trapped nanoparticle coupling cavity

机译：量子基态转化和降温光被困的天平动模式纳米粒子耦合腔

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摘要

We systematically investigate the nonlinearity of librational and translational modes, and present a theoretical scheme for quantum ground state cooling of both librational and translational modes of an optically levitated nonspherical nanoparticle via cavity mode. By expanding the trapping potential to the fourth order of both the translational and librational freedom degrees, we obtain the inherent nonlinearity of them and their nonlinear coupling. Through stability analysis, bi- and multistability are presented in this system, when either the librational or the translational drive is red-detuning. The system will be stabilized if and only if these two drives are both blue-detuning. In order to obtain the quantum ground states of the motional modes of ellipsoidal nanoparticle, a cavity mode is utilized to cool the librational and translational modes. By optimizing the frequencies and amplitudes of drives and residual air pressure, the quantum ground states of the librational and translational modes can be realized at the same time.
机译：我们系统地研究的非线性天平动和转化模式,和现在量子基态的理论方案冷却天平动和转化一个光学悬浮nonspherical模式纳米颗粒通过腔模式。捕获可能的四阶平动和天平动自由度,我们获得的固有非线性他们和他们的非线性耦合。稳定性分析,bi和多稳定性提出了在此系统中,当的天平动或平动驱动器red-detuning。且仅当这两个驱动器都是blue-detuning。基态的动态模式椭球形纳米颗粒,腔模式利用天平动和降温平移模式。频率和振幅的驱动器和残留空气压力的量子基态天平动和转化模式意识到在同一时间。

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