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Hong–Ou–Mandel interference with two independent weak coherent states 被引量:3
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作者 陈华 安雪碧 +4 位作者 伍娟 银振强 王双 陈巍 韩正甫 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第2期76-81,共6页
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). ... 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. 展开更多
关键词 Hong-Ou-Mandel interference weak coherent states measurement-device-independent quantumkey distribution
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Generation of entanglement molecules via weak coherent field in cavity QED
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作者 苏万钧 杨贞标 吴怀志 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第2期593-596,共4页
This paper presents a method for generating entanglement molecules, which is introduced by Dur (2001 Phys. Rev. A). In this scheme, N ladder-type three-level atoms are sent through a resonant weak coherent cavity fi... This paper presents a method for generating entanglement molecules, which is introduced by Dur (2001 Phys. Rev. A). In this scheme, N ladder-type three-level atoms are sent through a resonant weak coherent cavity field, then the system states are measured. And the system field may collapse onto some possible types of entanglement molecules. Meanwhile it discusses about the interaction time from the experimental point of view, and compare the result with the previous scheme proposed by Huang (2004 J. Phys. B: At. Mol. Opt. Phys.). 展开更多
关键词 weak coherent state resonant interaction entanglement molecules
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