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Hong-Ou-Mandel interference with two independent weak coherent states |
Hua Chen(陈华), Xue-Bi An(安雪碧), Juan Wu(伍娟), Zhen-Qiang Yin(银振强), Shuang Wang(王双), Wei Chen(陈巍), Zhen-Fu Han(韩正甫) |
Key Laboratory of Quantum Information of Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026, China |
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Abstract 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.
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Received: 07 September 2015
Revised: 21 October 2015
Accepted manuscript online:
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PACS:
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03.67.-a
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(Quantum information)
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42.50.-p
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(Quantum optics)
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03.67.Hk
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(Quantum communication)
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03.67.Dd
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(Quantum cryptography and communication security)
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Fund: 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) and the "Strategic Priority Research Program (B)" of the Chinese Academy of Sciences (Grant No. XDB01030100 and XDB01030300). |
Corresponding Authors:
Xue-Bi An
E-mail: yinzheqi@mail.ustc.edu.cn
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Cite this article:
Hua Chen(陈华), Xue-Bi An(安雪碧), Juan Wu(伍娟), Zhen-Qiang Yin(银振强), Shuang Wang(王双), Wei Chen(陈巍), Zhen-Fu Han(韩正甫) Hong-Ou-Mandel interference with two independent weak coherent states 2016 Chin. Phys. B 25 020305
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