基于系综金刚石氮空位的色心量子调控系统设计

Design of Quantum Manipulation System Based on Ensemble of Nitrogen-vacancy Color Centers in Diamond

为了实现量子的自旋调控和精密测量,将金刚石作为自旋载体材料,设计了基于系综金刚石氮空位(nitrogen-vacancy,NV)色心量子调控系统。通过利用金刚石独特的自旋三重态容易被初始化、操控和读出,基于Lab VIEW软件,设计编写了脉冲序列发生模块并搭建了共聚焦系统,调控了系综NV色心的自旋量子态。结果表明:该系统可以调控系综NV色心的自旋量子态;实现了NV色心拉比振荡实验的测量;拉比振荡周期为100 ns。可见该系统结构设计简单,为下一步延长退相干时间,提高系统灵敏度打下基础。

In order to realize quantum spin manipulation and precision measurement, a quantum control system based on ensemble of nitrogen-vacancy (NV) color centers in diamond was designed in which diamond was promised a good candidate of spin carrier. As the unique spin triplet state of diamond, it is easy to be initialized, manipulated and read. A confocal system and pulse sequence generation module based on Labview was used to control the spin quantum state of the ensemble NV color centers. The results show that the system can regulate the spin quantum state of NV centers and the period of Rabi oscillation can achieve approximately 100 ns based on the experiment results. It is concluded that the design of the system is simple. This research can help to extend the decoherence time and improve the system sensitivity, which is a great potential application in quantum optics.