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arXiv · 1102.0226

Microwave dressing of Rydberg dark states

M. Tanasittikosol·J. D. Pritchard·D. Maxwell·A. Gauguet·K. J. Weatherill·R. M. Potvliege·C. S. Adams
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Abstract

We study electromagnetically induced transparency (EIT) in the 5s$\rightarrow$5p$\rightarrow$46s ladder system of a cold $^{87}$Rb gas. We show that the resonant microwave coupling between the 46s and 45p states leads to an Autler-Townes splitting of the EIT resonance. This splitting can be employed to vary the group index by $\pm 10^5$ allowing independent control of the propagation of dark state polaritons. We also demonstrate that microwave dressing leads to enhanced interaction effects. In particular, we present evidence for a $1/R^3$ energy shift between Rydberg states resonantly coupled by the microwave field and the ensuing breakdown of the pair-wise interaction approximation.

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M. Tanasittikosol, J. D. Pritchard, D. Maxwell, A. Gauguet, K. J. Weatherill, R. M. Potvliege, C. S. Adams. 2011-02-01. Microwave dressing of Rydberg dark states. https://doi.org/10.1088/0953-4075/44/18/184020

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