| Original Articles |
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Strong Correlation of Fluorescence Photons without Quantum Interference |
| HU Xiang-Ming;WANG Fei |
| Department of Physics, Huazhong Normal University, Wuhan 430079 |
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| Cite this article: |
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HU Xiang-Ming, WANG Fei 2007 Chin. Phys. Lett. 24 421-423 |
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Abstract It has been predicted that a driven three-level V atom can emit strongly correlated fluorescence photons in the presence of quantum interference. Here we examine the effects of quantum interference on the intensity correlation of fluorescence photons emitted from a driven three-level Λ atom. Unexpectedly, strong correlation occurs without quantum interference. The quantum interference tends to reduce the correlation function to a normal level. The essential difference between these two cases is traced to the different effects of quantum interference on coherent population trapping (CPT). For the V atom, quantum interference and coherent excitation combine to lead to CPT. For the Λ atom, owever, the quantum interference tends to spoil CPT while the coherent excitation induces the effect.
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| Keywords:
42.50.Ct
32.50.+d
32.80.Qk
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Received: 10 October 2006
Published: 24 February 2007
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| PACS: |
42.50.Ct
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(Quantum description of interaction of light and matter; related experiments)
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32.50.+d
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(Fluorescence, phosphorescence (including quenching))
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32.80.Qk
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(Coherent control of atomic interactions with photons)
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