Cavity-Induced Enhancement of Squeezing in Resonance Fluorescence of a V-Type Three-Level Atom |
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| Authors: | ZHOU Lu LI Gao-Xiang ZHAN Ming-Sheng |
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| Affiliation: | State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071Graduate School, Chinese Academy of Sciences, Beijing 100080State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062Department of Physics, Huazhong Normal University, Wuhan 430079 |
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| Abstract: | The quadrature squeezing spectra in the resonance fluorescence of a V-type three-level atom driven by a coherent field and coupled to a single-mode cavity is investigated. For weak excitation, the fluorescence field exhibit squeezing in the out-of-phase quadrature. The coupling between the atom and the cavity mode can greatly enhance the squeezing centred at the laser frequency. More importantly, for strong excitation, under the effect of the cavity-atom coupling, the in-phase quadrature of fluorescence can exhibit two-mode squeezing at the two inner sideband frequencies. By working in the dressed-state representation and hiring secular approximation, we give an analytical explanation for the effect. The result shows, under appropriate conditions, the squeezing can be greatly enhanced by appropriately tuning the cavity resonant frequency. |
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| Keywords: | 42.50.Ct 42.50.Hz 42.50.Dv 32.80.-t |
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