Quantum interferometer with two-mode squeezed vacuum：Ŝz2 measurement

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

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.

Keywords: Mach–Zehnder interferometer phase sensitivity

Received: 17 March 2013
Revised: 08 April 2013
Accepted manuscript online:

PACS:	42.50.St	(Nonclassical interferometry, subwavelength lithography)
	42.50.Dv	(Quantum state engineering and measurements)
	03.65.Ta	(Foundations of quantum mechanics; measurement theory)

Fund: 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).

Corresponding Authors: Jin Guang-Ri
E-mail: grjin@bjtu.edu.cn

Cite this article:

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 2013 Chin. Phys. B 22 114206

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