Effect of Injected Noise on Electromagnetically Induced Transparency and Slow Light

Details Effect of Injected Noise on Electromagnetically Induced Transparency and Slow Light Effect of Injected Noise on Electromagnetically Induced Transparency and Slow Light

2011-05-18

arxiv.org/abs/1105.3603v1

Physics

Quantum Physics

6 Pages, 7 Figures

Scientific paper

We have examined theoretically the phenomenon of Electromagnetically Induced Transparency (EIT) in a three-level system operating in the lambda-configuration in presence of an externally injected noise coupling the ground level to the intermediate (metastable) level. The changes in the depth and the width of the induced transparency and the slowing down of the probe light have been calculated as function of the probe detuning and the strength of the injected noise. The calculations are within the rotating-wave approximation (RWA). Our main results are the reduction and the broadening of the EIT with increasing strength of the injected noise, and a reduction in the slowing down of group velocity of the probe-laser beam. Thus, the injected semi-classical noise, unlike the quantum-dynamical noise associated with the spontaneous emission, is not effectively cancelled by the EIT mechanism.

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