English
 
通知: ·180828 肖智博士学术报告    ·180820 苗子博博士学术报告    ·180820 袁海东教授学术报告    ·180727 陈雁北教授学术报告    ·180705 黄乘利研究员学术报告   
 
 


  发表论文

  研究小组
  ·2013年5月小组照片
·2014年9月小组照片
  研究方向
  科研项目
  研究成果
  ·发表论文
·获奖
·专利
  最新进展

  文章统计

  2014年 (15)
  2013年 (8)
  2012年 (11)
 

发表论文 您的位置是: 首页 > 科学研究 > 研究成果 > 发表论文 > 正文

 

2018 Maximal quantum Fisher information for phase estimation without initial parity

发布时间:2018-06-13          来源:           浏览次数:

XU YU,1 XIANG ZHAO,1,2 LUYI SHEN,1,3 YANYAN SHAO,4 JING LIU,4,5 AND XIAOGUANG WANG1,6
1 Zhejiang Institute of Modern Physics, Department of Physics, Zhejiang University, Hangzhou 310027, China
2 Department of Physics, ETH Zurich, 8049 Zurich, Switzerland
3 Department of Engineer, Ecole Polytechnique, France
4 MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, School of Physics, Huazhong University of Science and Technology,Wuhan 430074, China
5 liujingphys@hust.edu.cn
6 xgwang@zimp.zju.edu.cn


Abstract: Mach-Zehnder interferometer is a common device in quantum phase estimation and the photon losses in it are an important issue for achieving a high phase accuracy. Here we thoroughly discuss the precision limit of the phase in the Mach-Zehnder interferometer with a coherent state and a superposition of coherent states as input states. By providing a general analytical expression of quantum Fisher information, the phase-matching condition and optimal initial parity are given. Especially, in the photon loss scenario, the sensitivity behaviors are analyzed and specific strategies are provided to restore the phase accuracies for symmetric and asymmetric losses.


https://doi.org/10.1364/OE.26.016292

上一篇:2018 High-power tunable low-noise coherent source at 1.06 μm based on a surface-emitting semiconductor laser
下一篇:2018 High-power all-fiber ultra-low noise laser
 
 
 

Copyright (C) 华中科技大学引力中心 地址:湖北省武汉市洪山区珞喻路1037号 邮编:430074