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Title: Two-photon beating experiment using biphotons generated from a two-level system
Authors: Wen, Jianming
Du, Shengwang
Rubin, Morton H.
Oh, Eun
Keywords: Bell theorem
Light interference
Optical pumping
Quantum entanglement
Refractive index
Two-photon processes
Issue Date: 3-Sep-2008
Citation: Physical Review A, v. 78, iss. 3, 3 September 2008, p. 033801
Abstract: We propose a two-photon beating experiment based upon biphotons generated from a resonant pumping two-level system operating in a backward geometry. On the one hand, the linear optical-response leads biphotons produced from two sidebands in the Mollow triplet to propagate with tunable refractive indices, while the central-component propagates with unity refractive index. The relative phase difference due to different refractive indices is analogous to the pathway-length difference between long-long and short-short pathways in the original Franson interferometer. By subtracting the linear Rayleigh scattering of the pump, the visibility inthe center part of the two-photon beating interference can be ideally manipulated among [0, 100%] by varying the pump power, the material length, and the atomic density, which indicates a Bell-type inequality violation. On the other hand, the proposed experiment may be an interesting way of probing the quantum nature of the detection process. The interference will disappear when the separation of the Mollow peaks approaches the fundamental time scales for photon absorption in the detector.
Rights: Physical Review A © copyright (2008) American Physical Society. The Journal's web site is located at
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