Inhibition of electromagnetically induced absorption due to excited state decoherence in Rb vapor

Details Inhibition of electromagnetically induced absorption due to excited state decoherence in Rb vapor Inhibition of electromagnetically induced absorption due to excited state decoherence in Rb vapor

2002-11-12

arxiv.org/abs/quant-ph/0211065v1

Physics

Quantum Physics

8 pages, 7 figures, submitted to Physical Review A

Scientific paper

10.1103/PhysRevA.67.043810

The explanation presented in [Taichenachev et al, Phys. Rev. A {\bf 61}, 011802 (2000)] according to which the electromagnetically induced absorption (EIA) resonances observed in degenerate two level systems are due to coherence transfer from the excited to the ground state is experimentally tested in a Hanle type experiment observing the parametric resonance on the $% D1$ line of $^{87}$Rb. While EIA occurs in the $F=1\to F^{\prime}=2 $ transition in a cell containing only $Rb$ vapor, collisions with a buffer gas ($30 torr$ of $Ne$) cause the sign reversal of this resonance as a consequence of collisional decoherence of the excited state. A theoretical model in good qualitative agreement with the experimental results is presented.

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