Wave equation for dark coherence in three-level media |
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Authors: | Eberly J H Kozlov V V |
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Institution: | Rochester Theory Center for Optical Science and Engineering, University of Rochester, Rochester, NY 14627, USA. |
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Abstract: | We report the derivation of a wave equation for coherence in "dark state" two-photon-resonance spectroscopy. One of its consequences is a dark state area theorem. The dark area theorem is a single ordinary differential equation which is globally equivalent, in a way we describe, to the full set of five coupled nonlinear partial differential equations that govern space-time evolution of two-pulse coherence in a lambda medium. The predictions of the dark area theorem are open to test via laser spectroscopy in dilute vapors and inhomogeneously broadened solids. |
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