Hong-Ou-Mandel interference with two independent weak coherent states

Recently, the Hong-Ou-Mandel （HOM） interference between two independent weak coherent pulses （WCPs） has been paid much attention due to the measurement-device-independent （MDI） quantum key distribution （QKD）. Using classical wave theory, articles reported before show that the visibility of this kind...

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Bibliographic Details
Published inChinese physics B Vol. 25; no. 2; pp. 76 - 81
Main Author 陈华 安雪碧 伍娟 银振强 王双 陈巍 韩正甫
Format Journal Article
LanguageEnglish
Published 01.02.2016
Subjects
Coherence
Experiment design
Fluctuation
Interference
Lasers
Quantum cryptography
Scanning
Visibility
实验设计
干涉
抗干扰性
相干态
相干脉冲
设备无关
量子光学
量子密钥分配
Online AccessGet full text
ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/25/2/020305

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Summary:Recently, the Hong-Ou-Mandel （HOM） interference between two independent weak coherent pulses （WCPs） has been paid much attention due to the measurement-device-independent （MDI） quantum key distribution （QKD）. Using classical wave theory, articles reported before show that the visibility of this kind of HOM-type interference is 〈 50%. In this work, we analyze this kind of interference using quantum optics, which reveals more details compared to the wave theory. Analyses confirm the maximum visibility of 50%. And we conclude that the maximum visibility of 50% comes from the two single-photon states in WCPs, without considering the noise. In the experiment, we successfully approach the visibility of 50% by using WCPs splitting from the single pico-second laser source and phase scanning. Since this kind of HOM interference is immune to slow phase fluctuations, both the realized and proposed experiment designs can provide stable ways of high-resolution optical distance detection.
Bibliography:Hua Chent, Xue-Bi An Juan Wu, Zhen-Qiang , Shuang Wang, Wei Chen, and Zhen-Fu Han Key Laboratory of Quantum Information of Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026, China
Recently, the Hong-Ou-Mandel （HOM） interference between two independent weak coherent pulses （WCPs） has been paid much attention due to the measurement-device-independent （MDI） quantum key distribution （QKD）. Using classical wave theory, articles reported before show that the visibility of this kind of HOM-type interference is 〈 50%. In this work, we analyze this kind of interference using quantum optics, which reveals more details compared to the wave theory. Analyses confirm the maximum visibility of 50%. And we conclude that the maximum visibility of 50% comes from the two single-photon states in WCPs, without considering the noise. In the experiment, we successfully approach the visibility of 50% by using WCPs splitting from the single pico-second laser source and phase scanning. Since this kind of HOM interference is immune to slow phase fluctuations, both the realized and proposed experiment designs can provide stable ways of high-resolution optical distance detection.
Hong-Ou-Mandel interference, weak coherent states, measurement-device-independent, quantumkey distribution
11-5639/O4
ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/25/2/020305