Quantum interferometer with two-mode squeezed vacuum：S^z2 measurement

Quantum interferometric strategy with input two-mode squeezed vacuum [Phys. Rev. Lett. 104 103602] is reexamined for both parity and S^z2 measurements. Unlike the previous scheme, we find that phase sensitivity obtained with the S^z2 measurement is minimized at phase origin, which may be useful to e...

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Published in中国物理B：英文版 no. 11; pp. 315 - 318
Main Author 张渊明 李昕伟 金光日
Format Journal Article
LanguageEnglish
Published 2013
Subjects
压缩真空
双模
奇偶检测
干涉仪
校验和
测量
相位灵敏度
量子干涉
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Summary:Quantum interferometric strategy with input two-mode squeezed vacuum [Phys. Rev. Lett. 104 103602] is reexamined for both parity and S^z2 measurements. Unlike the previous scheme, we find that phase sensitivity obtained with the S^z2 measurement is minimized at phase origin, which may be useful to estimate a small phase shift at high precision. For the phase deviated from zero, the sensitivity increases more slowly than that of the parity detection.
Bibliography:Mach-Zehnder interferometer, phase sensitivity
Quantum interferometric strategy with input two-mode squeezed vacuum [Phys. Rev. Lett. 104 103602] is reexamined for both parity and S^z2 measurements. Unlike the previous scheme, we find that phase sensitivity obtained with the S^z2 measurement is minimized at phase origin, which may be useful to estimate a small phase shift at high precision. For the phase deviated from zero, the sensitivity increases more slowly than that of the parity detection.
11-5639/O4
Zhang Yuan-Ming, Li Xin-Wei, Jin Guang-Ri（Department of Physics, Beijing Jiaotong University, Beijing 100044, China）
ISSN:1674-1056
2058-3834