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Paper Abstract and Keywords
Presentation 2020-12-10 13:00
[Poster Presentation] Precision phase measurement in Mach-Zehnder interferometer with three-photon by using a weak coherent and a two-photon state
Lifeng Duan, Aojie Xu, Masayoshi Watanabe, Yun Zhang (UEC)
Abstract (in Japanese) (See Japanese page) 
(in English) We carry out investigation on the precision phase measurement with three-photon in Mach-Zehnder interferometer by injecting a weak coherent and a two-photon state generated from a spontaneous parametric down conversion both in theory and experiment. The phase sensitivity in this system is quantified as a function of the amplitude ratio of between coherent and two-photon state. It shows that the phase sensitivity reaches the Heisenberg limit when an optimal amplitude ratio is chosen. The quantified method implies a fundamental connection between standard quantum limit and Heisenberg limit and it may be extended to quantitatively describe precision phase with other arbitrary photon number.
Keyword (in Japanese) (See Japanese page) 
(in English) Phase sensitivity / Mach-Zehnder interferometer / Amplitude ratio / Standard quantum limit / Heisenberg limit / / /  
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Conference Information
Committee QIT  
Conference Date 2020-12-10 - 2020-12-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Quantum Information 
Paper Information
Registration To QIT 
Conference Code 2020-12-QIT 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Precision phase measurement in Mach-Zehnder interferometer with three-photon by using a weak coherent and a two-photon state 
Sub Title (in English)  
Keyword(1) Phase sensitivity  
Keyword(2) Mach-Zehnder interferometer  
Keyword(3) Amplitude ratio  
Keyword(4) Standard quantum limit  
Keyword(5) Heisenberg limit  
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1st Author's Name Lifeng Duan  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Aojie Xu  
2nd Author's Affiliation The University of Electro-Communications (UEC)
3rd Author's Name Masayoshi Watanabe  
3rd Author's Affiliation The University of Electro-Communications (UEC)
4th Author's Name Yun Zhang  
4th Author's Affiliation The University of Electro-Communications (UEC)
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Speaker Author-1 
Date Time 2020-12-10 13:00:00 
Presentation Time 90 minutes 
Registration for QIT 
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