Quantum interferometer with two-mode squeezed vacuum：Ŝz2 measurement

doi:10.1088/1674-1056/22/11/114206

中国物理B ›› 2013, Vol. 22 ›› Issue (11): 114206-114206.doi: 10.1088/1674-1056/22/11/114206

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Quantum interferometer with two-mode squeezed vacuum：Ŝ_z² measurement

张渊明, 李昕伟, 金光日

Department of Physics, Beijing Jiaotong University, Beijing 100044, China

收稿日期:2013-03-17 修回日期:2013-04-08 出版日期:2013-09-28 发布日期:2013-09-28
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11174028), the Fundamental Research Funds for the Central Universities of Ministry of Education of China (Crant Nos. 2011JBZ013 and 2012YJS117), the Program for New Century Excellent Talents in University of Ministry of Education of China (Crant No. NCET-11-0564), and the National Innovation Experiment Program for University Students, China (Grant Nos. 1270021 and 1270037).

Quantum interferometer with two-mode squeezed vacuum：Ŝ_z² measurement

Zhang Yuan-Ming (张渊明), Li Xin-Wei (李昕伟), Jin Guang-Ri (金光日)

Department of Physics, Beijing Jiaotong University, Beijing 100044, China

Received:2013-03-17 Revised:2013-04-08 Online:2013-09-28 Published:2013-09-28
Contact: Jin Guang-Ri E-mail:grjin@bjtu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11174028), the Fundamental Research Funds for the Central Universities of Ministry of Education of China (Crant Nos. 2011JBZ013 and 2012YJS117), the Program for New Century Excellent Talents in University of Ministry of Education of China (Crant No. NCET-11-0564), and the National Innovation Experiment Program for University Students, China (Grant Nos. 1270021 and 1270037).

摘要/Abstract

摘要： Quantum interferometric strategy with input two-mode squeezed vacuum [Phys. Rev. Lett. 104 103602] is reexamined for both parity and Ŝ_z² measurements. Unlike the previous scheme, we find that phase sensitivity obtained with the Ŝ_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.

关键词: Mach–Zehnder interferometer, phase sensitivity

Abstract: Quantum interferometric strategy with input two-mode squeezed vacuum [Phys. Rev. Lett. 104 103602] is reexamined for both parity and Ŝ_z² measurements. Unlike the previous scheme, we find that phase sensitivity obtained with the Ŝ_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.

Key words: Mach–Zehnder interferometer, phase sensitivity

中图分类号: (Nonclassical interferometry, subwavelength lithography)

42.50.St

42.50.Dv (Quantum state engineering and measurements) 03.65.Ta (Foundations of quantum mechanics; measurement theory)

张渊明, 李昕伟, 金光日. Quantum interferometer with two-mode squeezed vacuum：Ŝ_z² measurement[J]. 中国物理B, 2013, 22(11): 114206-114206.

Zhang Yuan-Ming (张渊明), Li Xin-Wei (李昕伟), Jin Guang-Ri (金光日). Quantum interferometer with two-mode squeezed vacuum：Ŝ_z² measurement[J]. Chin. Phys. B, 2013, 22(11): 114206-114206.

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Quantum interferometer with two-mode squeezed vacuum：Ŝ_z² measurement

Quantum interferometer with two-mode squeezed vacuum：Ŝ_z² measurement

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