Phase sensitivity with a coherent beam and twin beams via intensity difference detection

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外文摘要：We focus on the Mach-Zehnder interferometer(MZI)with the input of a coherent beam and one of the bright en-tangled twin beams with an external power reference beam employed for measurement.The results show that the phase sensitivity can reach sub-Heisenberg limit and approach quantum Cramér-Rao bound by changing the squeezing parame-ters and the photon number of the coherent beam,under the phase-matching condition.The absence of the external power reference beam will degrade the performance of the phase sensitivity.Meanwhile,this scheme shows good robustness against the losses of the photon detectors.We present a detailed discussion about the phase sensitivities when the inputs are two coherent beams,or a coherent beam plus a single-mode squeezed vacuum beam based on the MZI.This scenario can be applied in the field of phase precision measurements and other optical sensors.

外文关键词：

Mach-Zehnder interferometerphase sensitivityquantum squeezing

作者：

刘俊、邵涛、李晨露、张敏洋、胡友友、陈东旭、卫栋

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作者单位：

School of Science,Jiangsu University of Science and Technology,Zhenjiang 212003,China

Quantum Information Research Center,Shangrao Normal University,Shangrao 334001,China

School of Physics,Xi'an Jiaotong University,Xi'an 710049,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Jiangsu ProvinceJiangsu Provincial Key Research and Development ProgramJiangxi Provincial Natural science FoundationJiangxi Provincial Natural science FoundationGeneral Project of Natural Science Research in Colleges and Universities of Jiangsu Province

项目编号：

121041901210418912204312BK20210874BE202214320224BAB21101420232BAB20104220KJB140008

出版年：

2024

DOI：

10.1088/1674-1056/ad0115

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

年,卷(期)：2024.33(1)

参考文献量42