Quantum interference in interacting three-level Rydberg gases : coherent population trapping and electromagnetically induced transparency

Sevinçli, S and Ates, C and Pohl, T and Schempp, H and Hofmann, C S and Günter, G and Amthor, T and Weidemüller, M and Pritchard, J D and Maxwell, D and Gauguet, A and Weatherill, K J and Jones, M P A and Adams, C S (2011) Quantum interference in interacting three-level Rydberg gases : coherent population trapping and electromagnetically induced transparency. Journal of Physics B: Atomic, Molecular and Optical Physics, 44 (18). ISSN 0953-4075

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Abstract

In this paper, we consider the effects of strong dipole-dipole interactions on three-level interference phenomena such as coherent population trapping and electromagnetically induced transparency. Experiments are performed on laser cooled rubidium atoms and the results compared to a many-body theory based on either a reduced many-body density matrix expansion or Monte Carlo simulations of many-body rate equations. We show that these approaches permit quantitative predictions of the experimentally observed excitation and transmission spectra. Based on the calculations, we moreover predict a universal scaling of the nonlinear response of cold Rydberg gases.