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

作　　者：陈华 安雪碧 伍娟 银振强 王双 陈巍 韩正甫 

机构地区：[1]Key Laboratory of Quantum information ot Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026, China

出　　处：《Chinese Physics B》2016年第2期76-81,共6页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grants Nos.2011CBA00200 and 2011CB921200);the National Natural Science Foundation of China(Grant Nos.61201239,61205118,11304397,and 61475148);the“Strategic Priority Research Program(B)”of the Chinese Academy of Sciences(Grant No.XDB01030100 and XDB01030300)

摘　　要：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.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.

关 键 词：Hong-Ou-Mandel interference weak coherent states measurement-device-independent quantumkey distribution 

分 类 号：O413[理学—理论物理] TN918.4[理学—物理]