原子核自旋陀螺仪的基本原理

THE PRINCIPLE OF ATOMIC SPIN GYROSCOPE BASED ON A COMAGNETOMETER

介绍了一种基于K-^3He comagetometer原理的新型核自旋陀螺仪．这种陀螺仪精度提高的空间大，因此对它的研究具有重要意义．在comagnetometer中，系统状态演化的方程较为复杂，在简化的Bloch绘景下，给出了comagnetometer的输出信号与陀螺仪转动角度的关系．最后，将系统状态演化的方程推广到量子滤波方程，通过连续测量和量子反馈控制的方法，达到提高系统的稳定性和测量灵敏度的目的．

We describe a new nuclear spin gyroscope based on K-3He comagnetometer. In this type of gyroscope, there is much space in improving the sensitivity of measurement, therefore, it＇s significant to study it. In the comagnetometer, the state equation of the system is very complicated, and we just give the relationship between comagnetometer signal and the rotation angle of gyroscpoe in Bloch picture. Finally, we extend the equation of system to quantum filtering equation, so that we could improve the stability of system and sensitivity of measurement by continuous measurement and quantum feedback control.