Generation of two-axis countertwisting squeezed spin states via Uhrig dynamical decoupling  

作　　者：Jiying ZHANG Shan WU Yongchang ZHANG Zhengwei ZHOU 

机构地区：[1]Institute for Interdisciplinary Research,Jianghan University,Wuhan 430056,China [2]Department of Physics and Astronomy,Aarhus University,Ny Munkegade 120 DK 8000,Denmark [3]Key Laboratory of Quantum Information,University of Science and Technology of China,Chinese Academy of Sciences,Hefei 230026,China [4]CAS Center for Excellence in Quantum Information and Quantum Physics,Hefei 230026,China

出　　处：《Science China(Information Sciences)》2021年第2期223-232,共10页中国科学（信息科学）（英文版）

基　　金：supported by National Natural Science Foundation of China(Grant Nos.11547244,11547208,11974334);the Foundation of Collaborative Innovation Team of Discipline Characteristics of Jianghan University(Grant No.03100061)。

摘　　要：We propose a scheme to generate two-axis countertwisting squeezed spin states from a one-axis twisting Hamiltonian via Uhrig dynamical decoupling.The proposed scheme significantly reduces the number of control pulses or requires shorter evolution time compared to previous proposals.The minimum number of applied pulses changes relative to the spin number almost linearly.The proposed scheme significantly relieves the experimental demand on the applied pulses or the evolution time,and we expect it would be within the reach of current spin squeezing experiment.

关 键 词：squeezed spin states Uhrig dynamical decoupling control pulses quantum control quantum metrology quantum information science 

分 类 号：O469[理学—凝聚态物理] O413[理学—电子物理学]