Spin Squeezing for Two Atoms in an Optical Coherent-State Cavity

被引：2

作者：

Bai, Xue-Min ^{[1
]}

Bai, Xue-Yun ^{[1
]}

Liu, Ni ^{[1
]}

Li, Jun-Qi ^{[1
]}

Liang, J-Q ^{[1
]}

机构：

[1] Shanxi Univ, Inst Theoret Phys, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Shanxi, Peoples R China

来源：

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2020年 / 59卷 / 01期

关键词：

Spin squeezing; Optical cavity; Phase transition; QUANTUM; NOISE;

D O I：

10.1007/s10773-019-04308-z

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We in this paper investigate the spin squeezing in relation with the phase transition from the normal to superradiant phases for two atoms in an optical cavity. The squeezing vanishes in the normal phase and jumps sharply to the maximum bound above the critical point of phase transition. In the high atom-field coupling regime, the squeezing vanishes again when the atom-field coupling reaches a threshold value. The squeezing alternates between two spin components in the intermediate region of atom-field coupling. An interesting observation is that the two spin components are squeezed alternately with the variation of phase angle of the cavity field. The squeezing factor indeed can be used to probe the phase transition and coherent-field properties as well.

引用

页码：173 / 180

页数：8

共 36 条

[1] Stability of atomic clocks based on entangled atoms -: art. no. 230801 [J].