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arXiv · 0912.4099

Coherent Population Trapping with Controlled Interparticle Interactions

H. Schempp·G. Günter·C. S. Hofmann·C. Giese·S. D. Saliba·B. D. DePaola·T. Amthor·M. Weidemüller·S. Sevinçli·T. Pohl
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Abstract

We investigate Coherent Population Trapping in a strongly interacting ultracold Rydberg gas. Despite the strong van der Waals interactions and interparticle correlations, we observe the persistence of a resonance with subnatural linewidth at the single-particle resonance frequency as we tune the interaction strength. This narrow resonance cannot be understood within a meanfield description of the strong Rydberg--Rydberg interactions. Instead, a many-body density matrix approach, accounting for the dynamics of interparticle correlations, is shown to reproduce the observed spectral features.

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H. Schempp, G. Günter, C. S. Hofmann, C. Giese, S. D. Saliba, B. D. DePaola, T. Amthor, M. Weidemüller, S. Sevinçli, T. Pohl. 2010-03-01. Coherent Population Trapping with Controlled Interparticle Interactions. https://doi.org/10.1103/physrevlett.104.173602

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