近年来，纳米微刻技术和量子光力学研究不断进展,明显推动诸多有广泛兴趣领域的发展,如宏观量子态产生与调控,宏观系统经典-量子渡越及一系列技术应用（基于纳米微振元的量子声学、光存储、干涉仪与传感器）。与此平行，人们用囚禁于光腔中的标量超冷气体及集体激发(bottom-up情形)模拟真实机械振子(top-down情形)，实验展示了虚拟振动自由度的线性光力耦合。最近，基于光腔中的旋量气体（反铁磁转子），我们从理论上发现对虚拟转动自由度的非线性光力耦合，借助该耦合将大粒子数自旋转子气体冷却到量子基态(PRL 106(2011)223601)。在此基础上，本课题进一步理论研究两方面问题：首先，研究基态附近的量子激发与量子态调控（如压缩转子与双转子纠缠）；其次，探索基于旋量物质波的光力学调控或新型混合量子器件，如自旋转子-机械振子量子传递与纠缠，及旋量原子分子-纳米悬臂相干耦合。

In recent years, great advances of nanofabrications and quantum optomechanics have led to significant contributions to a broad ranges of fields, i.e. creaions and manipulations of macroscopic quantum states, classical-to-quantum crossover of increasing-size objects, and many practical applications from quantum phononics to quantum memory or high-precision interferometers. In apparallel to the top-down case, people also experimentally demonstrated the so-called bottom-up case, i.e. an analog of fictitious mechanical elements via exciations of ultracold scalar atoms trapped in an optical cavity. Most recently, by considering the spinor atoms (antiferromagnetic spin-rotor gas) trapped in a cavity, we theoretically realized an analog of optomechanical control of fictitious rotational, instead of vibrational degree of freedom, with dispersive (instead of linear) coupling between the rotor and the cavity mode. This work provides an efficient way to cool the spin rotor to its quantum ground state (even with large number of particles). Starting from this work, we plan to theoretically study in this project the following very interesting topics: quantum jumps near the spin-rotor ground state, realizations of quantum squeezed rotor, and coherent coupling between the spin rotor and various nano-mechanical oscillators (such as the cavity mirror or the cantilever attached with a tiny magnet), especially quantum state transfer or entanglement within this new type of hybrid quantum device. These researches hold the promise to lead to more fruitful works along this fascinating direction combining the ultracold atoms, molecules, and the nanoscale devices.