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Light interactions in Rydberg ensembles

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Atoms in highly excited Rydberg states exhibit strong interactions over distance scales of a few microns. In our work we exploit the enhanced sensitivity of Rydberg states to control the propagation of light through an atomic ensemble. For example, if the atoms are prepared in a superposition of ground and Rydberg states [1] the medium acquires a giant electro-optic effect many orders of magnitude larger than other systems [2]. Our eventual goal is to exploit this giant non-linearity to control pulse propagation at the single photon level.

[1] AK Mohapatra et al. Phys. Rev. Lett. 98, 113003 (2007). [2] AK Mohapatra et al. arXiv:0804.3273

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