Two-mode Gaussian product states in a lossy interferometer

被引：3

作者：

Jaseem, Noufal ^{[1
]}

Shaji, Anil ^{[1
]}

机构：

[1] Indian Inst Sci Educ & Res, Sch Phys, Thiruvananthapuram 695016, Kerala, India

来源：

QUANTUM INFORMATION PROCESSING | 2017年 / 16卷 / 09期

关键词：

Quantum metrology; Two-mode Gaussian states; Photon loss; Quantum Fisher information; QUANTUM; LIMIT;

D O I：

10.1007/s11128-017-1671-2

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The quantum Fisher information for a two-mode, Gaussian product state in an interferometer subject to photon loss is studied. We obtain the quantum Cramer-Rao bound on the achievable precision in phase estimation using such states. The scaling of the measurement precision with the mean photon number is compared to the shot noise-limited scaling for dual squeezed vacuum states and dual squeezed, displaced vacuum states.

引用

页数：14

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