Phase-matching condition for enhancement of phase sensitivity in quantum metrology

被引：136

作者：

Liu, Jing ^{[1
]}

Jing, Xiaoxing ^{[1
]}

Wang, Xiaoguang ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Phys, Zhejiang Inst Modern Phys, Hangzhou 310027, Zhejiang, Peoples R China

来源：

PHYSICAL REVIEW A | 2013年 / 88卷 / 04期

关键词：

ENTANGLEMENT; GENERATION; SU(2); LIMIT;

D O I：

10.1103/PhysRevA.88.042316

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We find a phase-matching condition for enhancement of sensitivity in a Mach-Zehnder interferometer illuminated by an arbitrary state in one input port and an odd (even) state in the other port. Under this condition, the Fisher information becomes maximal with respect to the relative phase of two modes, and the phase sensitivity is enhanced. For the case with photon losses, we further find that the phase-matching condition remains unchanged with a coherent state and a coherent superposition state as the input states.

引用

页数：4

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