Electromagnetically induced transparency in an inverted Y-type four-level system

Abstract

The interaction of a weak probe laser with an inverted-Y type four-level atomic system driven by two additional coherent fields is investigated theoretically. Under the influence of the coherent coupling fields, the steady-state linear susceptibility of the probe laser shows that the system can have single or double electromagnetically induced transparency windows depending on the amplitude and the detuning of the coupling lasers. The corresponding index of refraction associated with the group velocity of the probe laser can be controlled at both transparency windows by the coupling fields. The propagation of the probe field can be switched from superluminal near the resonance to subluminal on resonance within the single transparency window when two coupling lasers are on resonance. This provides a potential application in quantum information processing. We propose an atomic ${}^{87}Rb$ system for experimental observation.

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• Photoassociative Production and Trapping of Ultracold KRb Molecules
• Wide-bandwidth, tunable, multiple-pulse-width optical delays using slow light in cesium vapor
• Optimal light storage in atomic vapor
• Electromagnetically induced transparency and dark fluorescence in a cascade three-level Lithium molecule
• Electromagnetically induced transparency in an inverted Y-type four-level system
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Cited by in corpus (3)

• Electromagnetically induced transparency in an inverted Y-type four-level system
• Noisy Coherent Population Trapping: Applications to Noise Estimation and Qubit State Preparation
• SU(4) based classification of four-level systems and their semiclassical solution