自旋压缩态及其在原子钟中的应用前景

Spin-squeezing state of atomic ensembles and its application prospect in atomic clocks

应用自旋压缩可以克服独立原子系综投影噪声所产生的标准量子极限。简要论述了自旋压缩态的基本概念和特性,并介绍了利用光学谐振腔对87Rb原子系综产生自旋压缩的实验方案,并从理论和技术两方面对实验中所遇到的一些退相干机制进行了讨论。最后,综述了自旋压缩态在原子钟中的应用前景及需要克服的问题。

Spin squeezing is a promising approach to overcoming the Standard Quantum Limit set by the projection noise of independent atomic ensembles. This paper briefly presents the basic concept and properties of spin squeezing, and introduces an experimental scheme of producing spin squeezing of ^87Rb ensemble using an optical resonator, as well as discusses the decoherence mechanisms encountered in the implementation of spin squeezing both theoretically and technically. Finally, the application prospects of spin squeezing in atomic clock and the related problems needed to be overcome are summarized.