论文标题
原子之间的相干谐振耦合和由空腔 - 空隙波动介导的机械振荡器
Coherent Resonant Coupling between Atoms and a Mechanical Oscillator Mediated by Cavity-Vacuum Fluctuations
论文作者
论文摘要
我们表明，通过腔场的量子真空波动，可以将原子耦合到机械振荡器，从而实现它们之间的能量传递过程。在由带有可移动镜和原子的空腔谐振器组成的混合量子系统中，这些过程以两种成对创造机制为主导：反旋转（原子 - 腔体系统）和动态Casimir交互项（光学机械系统）。由于这两种成对的创造机制，共振原子耦合是高阶虚拟过程的结果，其理论框架中有很好的过渡路径。我们对Atom Mirror System Hamiltonian进行了统一的转换，展示了两种成对创造的多阶过渡。通过调整原子的频率，我们表明可以在多种模式的腔中实现光子频率转换。此外，当涉及两个原子与相同的机械模式耦合时，可以同时将两个原子吸收的机械振荡器的单个振动激发。考虑到对腔光力学和其他系统的强大和超局结耦合的最新进展，我们认为我们的建议可以使用可用技术实施。
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.
