Coherent resonant coupling between atoms and a mechanical oscillator mediated by cavity-vacuum fluctuations
Coherent resonant coupling between atoms and a mechanical oscillator mediated by cavity-vacuum fluctuations
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DOI：
10.1103/physrevresearch.5.013075
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发表时间：
2022-04
影响因子：
4.2
通讯作者：
Bo Wang;Jiahui Hu;V. Macrì;Z. Xiang;F. Nori
中科院分区：
文献类型：
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作者：
Bo Wang;Jiahui Hu;V. Macrì;Z. Xiang;F. Nori
我们证明，原子可以通过空腔场的量子真空涨落耦合到机械振荡器，从而实现它们之间的能量转移过程。在由带有可移动镜子的空腔谐振器和原子组成的混合量子系统中，这些过程由两种配对生成机制主导：反向旋转（原子腔系统）和动态卡西米尔相互作用项（光机械系统）。由于这两种配对机制，共振原子镜耦合是具有不同转变路径的高阶虚拟过程的结果，在我们的理论框架中得到了很好的描述。我们对原子镜系统哈密顿量进行酉变换，展示了对创建的两种多阶跃迁。通过调节原子的频率，我们表明可以在多模腔内实现光子频率转换。此外，当涉及耦合到相同机械模式的两个原子时，机械振荡器的单个振动激励可以同时被两个原子吸收。考虑到腔光力学和其他系统的强耦合和超强耦合的最新进展，我们相信我们的建议可以使用现有技术来实现。
We show that an atom can be coupled to a mechanical oscillator via quantum vacuum fluctuations of a cavity field enabling energy transfer processes between them. In a hybrid quantum system consisting of a cavity resonator with a movable mirror and an atom, these processes are dominated by two pair-creation mechanisms: the counterrotating (atom-cavity system) and dynamical Casimir interaction terms (optomechanical system). Because of these two pair-creation mechanisms, the resonant atom-mirror coupling is the result of high-order virtual processes with different transition paths well described in our theoretical framework. We perform a unitary transformation to the atom-mirror system Hamiltonian, exhibiting two kinds of multiple-order transitions of the pair creation. By tuning the frequency of the atom, we show that photon frequency conversion can be realized within a cavity of multiple modes. Furthermore, when involving two atoms coupled to the same mechanical mode, a single vibrating excitation of the mechanical oscillator can be simultaneously absorbed by the two atoms. Considering recent advances in strong and ultrastrong coupling for cavity optomechanics and other systems, we believe our proposals can be implemented using available technology.