Phase sensitivity at the Heisenberg limit in an SU(1,1) interferometer via parity detection

被引：73
|
作者：
Li, Dong [1 ,2 ,3 ]
Gard, Bryan T. [2 ,3 ]
Gao, Yang [4 ]
Yuan, Chun-Hua [1 ,5 ]
Zhang, Weiping [5 ,6 ]
Lee, Hwang [2 ,3 ]
Dowling, Jonathan P. [2 ,3 ]
机构：
[1] East China Normal Univ, Dept Phys, Quantum Inst Light & Atoms, Shanghai 200062, Peoples R China
[2] Louisiana State Univ, Hearne Inst Theoret Phys, Baton Rouge, LA 70803 USA
[3] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
[4] Xinyang Normal Univ, Dept Phys, Xinyang 464000, Henan, Peoples R China
[5] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China
[6] Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China
来源：
PHYSICAL REVIEW A | 2016年 / 94卷 / 06期
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
QUANTUM OPTICAL METROLOGY; STATES; INFORMATION; OPERATOR;
D O I：
10.1103/PhysRevA.94.063840
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We theoretically investigate the phase sensitivity with parity detection on an SU(1,1) interferometer with a coherent state combined with a squeezed vacuum state. This interferometer is formed with two parametric amplifiers for beam splitting and recombination instead of beam splitters. We show that the sensitivity of phase estimation approaches the Heisenberg limit and give the corresponding optimal condition. Moreover, we derive the quantum Cramer-Rao bound of the SU(1,1) interferometer.
引用
收藏
页数：10
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