Detuning-enhanced cavity spin squeezing

被引：26
作者：
Zhang, Yan-Lei [1 ,2 ]
Zou, Chang-Ling [1 ,2 ,3 ]
Zou, Xu-Bo [1 ,2 ]
Jiang, Liang [3 ]
Guo, Guang-Can [1 ,2 ]
机构：
[1] Univ Sci & Technol China, Key Lab Quantum Informat, Hefei 230026, Peoples R China
[2] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China
[3] Yale Univ, Dept Appl Phys, New Haven, CT 06511 USA
来源：
PHYSICAL REVIEW A | 2015年 / 91卷 / 03期
基金：
中国国家自然科学基金;
关键词：
QUANTUM; ENSEMBLE; STATES; ATOMS; LIGHT;
D O I：
10.1103/PhysRevA.91.033625
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The unconditional squeezing of the collective spins of an atomic ensemble in a laser driven optical cavity [I. D. Leroux, M. H. Schleier-Smith, and V. Vuletie, Phys. Rev. Lett 104, 073602 (2010)] is studied and analyzed theoretically. Surprisingly, we find that the largely detuned driving laser can improve the scaling of cavity squeezing from S-2/5 to S-2/3, where S is the total atomic spin. Moreover, we also demonstrate that the experimental imperfection of photon scattering into free space can be efficiently suppressed by detuning.
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页数：8
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