Heisenberg-limited spin squeezing in coupled spin systems

被引:9
作者
Huang, Long-Gang [1 ,2 ]
Zhang, Xuanchen [1 ]
Wang, Yanzhen [1 ]
Hua, Zhenxing [1 ]
Tang, Yuanjiang [1 ]
Liu, Yong-Chun [1 ,3 ]
机构
[1] Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
[2] China Fire & Rescue Inst, Beijing 102202, Peoples R China
[3] Frontier Sci Ctr Quantum Informat, Beijing 100084, Peoples R China
基金
中国国家自然科学基金; 国家重点研发计划;
关键词
ENTANGLEMENT GENERATION; QUANTUM; STATES; ATOMS; NOISE; ENSEMBLE; LIGHT; TIMES;
D O I
10.1103/PhysRevA.107.042613
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Spin squeezing plays a crucial role in quantum metrology and quantum information science. Its generation is the prerequisite for further applications but still faces an enormous challenge since the existing physical systems rarely contain the required squeezing interactions. Here we propose a universal scheme to generate spin squeezing in coupled spin models with collective spin-spin interactions, which commonly exist in various systems. Our scheme can transform the coupled spin interactions into squeezing interactions and reach the extreme squeezing with Heisenberg-limited measurement precision scaling as 1/N for N particles. Only constant and continuous driving fields are required, which is a requirement that is accessible to a series of current realistic experiments. This work greatly enriches the variety of systems that can generate the Heisenberg-limited spin squeezing, with broad applications in quantum precision measurement.
引用
收藏
页数:9
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