新型光-原子非线性干涉仪的实验研究

项目名称： 新型光-原子非线性干涉仪的实验研究

项目编号： No.91536114

项目类型： 重大研究计划

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 陈丽清

作者单位： 华东师范大学

项目金额： 90万元

中文摘要： 对物理量进行高精度测量是众多科研学者追求的目标，所用的测量方法也有很多种，最常用的就是干涉。目前国际上已有两类干涉仪：全光干涉仪和原子干涉仪，分别用于测量光场相位敏感的或者原子相位敏感的物理量。到目前为止国际上尚没有一种干涉仪既能测量光场相位敏感的物理量，又能测量原子相位敏感的物理量。本项目正是针对这一状况，在我们前期的实验和理论研究基础上，提出新型光-原子非线性干涉仪方案。这一干涉仪的两个干涉场分别为光场和原子激发模，干涉强度既对光场相位也对原子相位敏感，相比全光干涉仪和原子干涉仪来说更灵活。我们采用非线性过程做为光-原子干涉仪的分束器，理论上它具有全光非线性干涉仪的优势，测量精度相比同等量级的线性干涉仪更高。本项目将给精密测量领域提供一种新的测量方法，从中发展出来的量子操控技术还能丰富并拓展量子光学、原子分子物理和精密测量等学科的内容。

中文关键词： 量子光学；精密测量；原子分子物理；原子相干效应；相干拉曼散射

英文摘要： Precision measurement of physical quantities is the goal of many research scholars, there are many measurement methods, the most commonly used one is the interference. There have been two types of interferometer: all-optical interferometer and atom interferometer, to measure the quantities sensitive to optical phase or atomic phase, respectively. Until now there isn’t a kind of interferometer to measure the physical quantities, which is both sensitive to optical phase and atomic phase. Here we proposed this project --nonlinear light-atom interferometer. Two fields in such interferometer is the optical field and atomic excitation, the interference output intensities are sensitive to the phases of the light field and atomic field at the same time. Compared to the all-optical interferometry and atomic interferometer, this interferometer is more flexible. We use non-linear process as the beam splitter of light-atom interferometer; it has the advantage of all-optical nonlinear interferometer in principle. Its measurement accuracy will be better than that of linear interferometer. This project will provide a new measurement method for precise measurement, and develop some quantum control technologies, which can enrich the scientific content of quantum optics, atomic and molecular physics, precision measurement, and so on.

英文关键词： quantum optics;Precision measurement;atomic and molecular physics;atomic coherence;coherent Raman scattering