Persistent and enhanced spin-nematic squeezing in a spinor Bose–Einstein condensate  

作　　者：Xinfang Li Jianning Liu Osei Seth Heng-Na Xiong Qing-Shou Tan Yixiao Huang 

机构地区：[1]School of Science,Zhejiang University of Science and Technology,Hangzhou 310023,China [2]School of Mechanical and Electrical Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China [3]Department of Applied Physics,Zhejiang University of Technology,Hangzhou 310023,China [4]School of Physics&Electronic Science,Hunan Institute of Science and Technology,Yueyang 414006,China

出　　处：《Communications in Theoretical Physics》2022年第2期44-50,共7页理论物理通讯（英文版）

基　　金：supported by the Natural Science Foundation of China through Grant No.11805047;the Natural Science Foundation of Zhejiang Province through Grant No.LY22A050002。

摘　　要：We propose a simple scheme to realize the persistent spin-nematic squeezing in a spinor Bose–Einstein condensate by rapidly turning-off the external magnetic field at a time that maximal spinnematic squeezing occurs.We observe that the optimal spin-nematic squeezing can be maintained in a nearly fixed direction.For a proper initial magnetic field,the optimal squeezing can be obviously enhanced.We further construct a spin-mixing interferometer,where the quantum correlation of the squeezed state(generated by our scheme)is fully utilized in the phase measurement,and show the phase sensitivity of the interferometer has a significant enhancement.

关 键 词：quantum metrology heisenberg limit interferometry 

分 类 号：O469[理学—凝聚态物理]