金刚石NV色心耦合纳米机械振子复合系统的量子特性及量子传感研究

固态量子系统如金刚石氮空位中心(NV色心)具有良好的操控性、可集成性等优点，是实现量子计算及量子信息处理的优良载体。本项目拟研究金刚石NV色心耦合纳米机械振子复合系统的量子特性和量子传感，探究基于这一复合量子系统构建新型量子器件的新原理和新方案。主要内容包括研究金刚石NV色心耦合纳米机械振子系统中量子和非线性光学效应，如机械振子冷却，电磁诱导透明现象，全光克尔效应，以及机械振子的压缩态，纠缠态等非经典态的制备；提出全光学方法测量纳米机械振子振动频率、耦合强度等新方案，揭示双光控制条件下实现纳米机械振子振动频率和耦合强度高灵敏度传感的物理机制和原理；进一步，将金刚石NV色心与微腔以及纳米机械振子系统原理结合，提出基于耦合纳米机械振子系统的高灵敏度和高精确度量子器件，包括量子全光晶体管，量子光学存储器件以及纳米光机质谱仪等。本项目的研究对精密测量、量子计算以及量子信息处理等领域具有重要的意义。

Solid-state quantum system, such as the nitrogen-vacancy center (NV center) in diamond, has the advantages of good controllability and integration, which is a promising candidate for quantum computation and quantum information processing. This project will investigate the quantum properties and sensing of the hybrid system consisting of NV center in diamond coupled to nanomechanical resonator, and explore new principles and schemes for constructing new quantum devices based on hybrid quantum systems. The main contents include the study of quantum and nonlinear optical effects of the hybrid system consisting of NV center in diamond coupled to nanomechanical resonator. For example, mechanical resonator cooling, electromagnetically induced transparency, all-optical Kerr effect, and the preparation of non-classical states such as the squeezed and entangled states of mechanical resonator. A new optical measurement method for measuring the vibration frequency of nanomechanical resonator and coupling strength of the system is proposed. The physical mechanism and principle of high-sensitive sensing of the vibration frequency and coupling strength of the nanomechanical resonator under the control of two optical fields are revealed. Further, the NV center in diamond is combined with micro-cavity and the principle of nanomechanical resonator system. Based on the NV center coupled to nanomechanical resonator system, the quantum devices of high sensitivity and precision are proposed, such as quantum all-optical transistor, quantum optical storage devices, nano-optomechanical mass spectrometry, and so on. The research of this project is of great significance in fields of the high precision measurement, quantum computation and quantum information processing.