Cooperative atom-light interaction in a blockaded Rydberg ensemble
arXiv:1006.4087 · doi:10.1103/PhysRevLett.105.193603
Abstract
By coupling a probe transition to a Rydberg state using electro-magnetically induced transparency (EIT) we map the strong dipole-dipole interactions onto an optical field. We characterize the resulting cooperative optical non-linearity as a function of probe strength and density. We show that the effect of dipole blockade cannot be described using a mean-field but requires an -atom cooperative model. Good quantitative agreement is obtained for three atoms per blockade with the Rydberg state. We place an upper-limit on the dephasing rate of the blockade spheres of kHz.
4 pages, 4 figures
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