Tunable two-axis spin model and spin squeezing in two cavities

doi:10.1088/1674-1056/25/5/050301

中国物理B ›› 2016, Vol. 25 ›› Issue (5): 50301-050301.doi: 10.1088/1674-1056/25/5/050301

Tunable two-axis spin model and spin squeezing in two cavities

Lixian Yu(俞立先), Caifeng Li(李彩凤), Jingtao Fan(樊景涛), Gang Chen(陈刚), Tian-Cai Zhang(张天才), Suotang Jia(贾锁堂)

1. Department of Physics, Shaoxing University, Shaoxing 312000, China;
2. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser spectroscopy, Shanxi University, Taiyuan 030006, China;
3. Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China;
4. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China;
5. Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

收稿日期:2015-11-14 修回日期:2016-01-06 出版日期:2016-05-05 发布日期:2016-05-05
通讯作者: Gang Chen E-mail:chengang971@163.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11422433, 11447028, 61227902, 11434007, and 61275211), the Natural Science Foundation of Zhejiang Province, China (Grant No. LY13A040001), and the Scientific Research Foundation of the Education Department of Zhejiang Province, China (Grant No. Y201122352).

Tunable two-axis spin model and spin squeezing in two cavities

Lixian Yu(俞立先)¹, Caifeng Li(李彩凤)^2,3, Jingtao Fan(樊景涛)², Gang Chen(陈刚)^2,5,, Tian-Cai Zhang(张天才)^4,5, Suotang Jia(贾锁堂)^2,5

1. Department of Physics, Shaoxing University, Shaoxing 312000, China;
2. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser spectroscopy, Shanxi University, Taiyuan 030006, China;
3. Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China;
4. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China;
5. Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

Received:2015-11-14 Revised:2016-01-06 Online:2016-05-05 Published:2016-05-05
Contact: Gang Chen E-mail:chengang971@163.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11422433, 11447028, 61227902, 11434007, and 61275211), the Natural Science Foundation of Zhejiang Province, China (Grant No. LY13A040001), and the Scientific Research Foundation of the Education Department of Zhejiang Province, China (Grant No. Y201122352).

摘要/Abstract

摘要：

Multi-mode cavities have now attracted much attention both experimentally and theoretically. In this paper, inspired by recent experiments of cavity-assisted Raman transitions, we realize a two-axis spin Hamiltonian H=q(J_x²+χJ_y²)+ω₀J_z in two cavities. This realized Hamiltonian has a distinct property that all parameters can be tuned independently. For proper parameters, the well-studied one- and two-axis twisting Hamiltonians are recovered, and the scaling of N^-1 of the maximal squeezing factor can occur naturally. On the other hand, in the two-axis twisting Hamiltonian, spin squeezing is usually reduced when increasing the atomic resonant frequency ω₀. Surprisingly, we find that by combining with the dimensionless parameter χ(>-1), this atomic resonant frequency ω₀ can enhance spin squeezing greatly. These results are beneficial for achieving the required spin squeezing in experiments.

关键词: two-axis spin model, spin squeezing, two cavities

Abstract:

Key words: two-axis spin model, spin squeezing, two cavities

中图分类号: (Phases: geometric; dynamic or topological)

03.65.Vf

42.50.Ct (Quantum description of interaction of light and matter; related experiments) 42.50.Pq (Cavity quantum electrodynamics; micromasers)

俞立先, 李彩凤, 樊景涛, 陈刚, 张天才, 贾锁堂. Tunable two-axis spin model and spin squeezing in two cavities[J]. 中国物理B, 2016, 25(5): 50301-050301.

Lixian Yu(俞立先), Caifeng Li(李彩凤), Jingtao Fan(樊景涛), Gang Chen(陈刚), Tian-Cai Zhang(张天才), Suotang Jia(贾锁堂). Tunable two-axis spin model and spin squeezing in two cavities[J]. Chin. Phys. B, 2016, 25(5): 50301-050301.

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Tunable two-axis spin model and spin squeezing in two cavities

Tunable two-axis spin model and spin squeezing in two cavities

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