单光子强耦合光力系统中机械振子非高斯型非经典态的制备及应用

With the advancement of microfabrication and experimental technologies, the optomechanics can enter into the single-photon strong-coupling regime. In this regime, exploring the non-classical nature of the mechanical resonators is one of the most important topics of quantum optics and the quantum information. Compared to Gaussian states, non-Gaussian ones possess stronger non-classical properties and have the effective application for quantum technology and high precision measurement. This project will devote to study the non-Gaussian nonclassical properties of the mechanical resonators in the single-photon strong-coupling cavity optomechanical systems. Meanwhile, the effects of the the intrinsic optomechanical nonlinearity on the the preparation of mechanical resonators in nonclassical states will be discussed in detail. Firstly, designing selectively coherent excitation, the theoretical schemes will be proposed for the efficient preparation of single Fock states and NOON states of mechanical resonators. Then the research on how to prepare the nonlinear two-mode squeezing light and injecting it to strong-coupling cavity optomechanical systems will be carried out. Our research can enrich the study of optomechanical family, and play a positive role in promoting quantum information processing and quantum network based on the motional states.

随着微制造工艺和实验技术的发展，单光子光力耦合已经达到强耦合区域。在强耦合腔光力系统中探索机械振子的非经典特性是量子光学及量子信息领域中的重要课题之一。与高斯态相比，非高斯的非经典态具有更强的非经典特性，因此可以更有效地应用到各种量子技术和高精密测量中。本申请项目拟研究强耦合腔光力系统中机械振子的非高斯非经典性质，揭示光力非线性相互作用对制备机械振子非经典态的影响。设计选择相干激发，提出将机械振子高效地制备于单声子态和NOON态的理论方案。深入研究如何通过设计非线性双模压缩光并注入强耦合光力系统中制备机械振子的非高斯纠缠态的新方案。我们的课题能够丰富对腔光力系统的研究，有望对机械振子的量子信息处理和量子网络的发展起到积极的促进作用。

腔光力系统的显著特点是其内在的非线性效应，腔内光场与机械振子的相互作用能通过光场的辐射压力来改变机械振子的运动状态，因而腔光力装置成为制备振子非经典态的一个重要资源。本项目以强耦合耗散型腔光力系统中非线性作用为主要研究对象，深入研究了非相干泵浦对振子非经典性质的影响；揭示光力非线性作用对振子的非经典性质的影响；采用量子热库理论，研究双模压缩的传递。此外，还研究了利用压缩光和透射场的零差探测提高光力系统中力学测量灵敏度。这些结果有望为量子信息处理、量子网络及高精密测量的发展起到积极的促进作用。