Cooperative atom-light interaction in a blockaded Rydberg ensemble |
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Authors: | Pritchard J D Maxwell D Gauguet A Weatherill K J Jones M P A Adams C S |
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Institution: | Department of Physics, Durham University, Rochester Building, South Road, Durham DH1 3LE, United Kingdom. j.d.pritchard@durham.ac.uk |
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Abstract: | By coupling a probe transition to a Rydberg state using electromagnetically induced transparency (EIT) we map the strong dipole-dipole interactions onto an optical field. We characterize the resulting cooperative optical nonlinearity as a function of probe strength and density. We demonstrate good quantitative agreement between the experiment and an N-atom cooperative model for N=3 atoms per blockade sphere and the n=60 Rydberg state. The measured linewidth of the EIT resonance places an upper limit on the dephasing rate of the blockade spheres of <110 kHz. |
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