由谐振腔和机械振子组成的光机械系统是目前最为热门的量子系统之一。在过去十年内，这种标准的光机械系统已经被大量研究且目前已经进入瓶颈阶段。然而，混合量子系统的崛起为光机械系统的持续研究打开了一个崭新的大门。现阶段，混合光机械系统已经成功吸引了理论和实验研究人员的关注，尤其是在光机械系统中引入稳定且易于调控的自由度。在众多量子系统中，人工原子正是由于其具有稳定的能级和易于调控等特性备受青睐。在这样的背景下，本项目拟展开如下三方面的研究：（1）研究人工原子是如何对光机械系统中光子和声子进行调控的以及调控带来的新奇量子效应；（2）如何利用人工原子的非线性来增强光机械系统的单光子辐射压力；（3）研究人工原子的引入对光机械系统固有非线性的影响。本项目的研究结果期望可以用来设计单光子或双光子开关和单光子源等量子器件。这些器件在量子信息、量子计算和全光电路等领域都有着非常重要的潜在应用。

Optomechanical systems, consisting of a cavity and a mechanical resonator, is one of the most popular quantum systems at present. In past decade, such a standard optomechanical system has been widely studied and now it is in its bottleneck period. However, the rising hybrid quantum systems open a new way for study in optomechanical systems. At this stage, hybrid optomechanical systems have successfully attracted much attention from theoretical and experimental researchers, especially for introducing a stable and easy manipulation degree of freedom. Among various quantum systems, artificial atoms are good choice because of their stable energies and easy manipulation. Under such a background, three points will be explored in the project: (1) How to manipulate the photons and phonons in optomechanical systems by the artificial atom, and studying the novel quantum effects in optomechanical systems induced by the artificial atom; (2) How to take advantage of the nonlinearity of the artificial atom to enhance the single-photon radiation pressure; (3) How to affect the intrinsic nonlinearity of the optomechanical system by introducing artificial atoms. The applicants expect that the research results can be used to design quantum devices such as single- or two-photon switch and single-photon resource. These devices have very important applications in quantum information, quantum computation and all-optical circuits.