量子重力梯度仪研究进展

重力梯度是重力位的二阶微分,对地球密度扰动具有更高的分辨率,能够更加精细、全面地反映重力位在空间上的变化.高精度重力梯度测量在地质调查、地球重力场测绘、惯性导航以及基础科学研究等方面发挥着重要作用.量子重力梯度仪是近年来快速发展的一种基于激光操控原子技术的新型高精度重力梯度测量设备,具有测量精度高、长期稳定性好等特点,...

Research Progress of Quantum Gravity Gradiometer

Gravity gradient is the second-order differential of the gravity potential, which has a higher resolution for the density disturbance of the earth, and can reflect the changes of the gravity potential in space more finely and comprehensively. High precision gravity gradient measurement plays an important role in geological survey, earth gravity field mapping, inertial navigation and basic scientific research. Quantum gravity gradiometer is a new type of high-precision gravity gradient measurement equipment based on the technology of manipulating atoms with lasers, which is developed rapidly in recent years. It has the characteristics of high measurement accuracy, good long-term stability and especially good suppression effect on vibration and noise. At present, the best sensitivity of quantum gravity gradiometers can reach 4E/Hz, which is equivalent to the state-of-the-art rotating accelerometer gravity gradiometer with a sensitivity of 3E/Hz. In this paper, the basic principle of quantum gravity gradiometers has been introduced. The development status of quantum gravity gradiometers at home and abroad is analyzed. Finally, the main limited factors on the accuracy of quantum gravity gradiometers and the future development direction are discussed.