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Anomalous broadening in driven dissipative Rydberg systems



Elizabeth A. Goldschmidt, Thomas L. Boulier, Roger C. Brown, Silvio B. Koller, Jeremy T. Young, Alexey V. Gorshkov, S L. Rolston, James V. Porto


We observe interaction-induced broadening of the two-photon 5s-18s transition in 87Rb atoms trapped in a 3D optical lattice. The measured linewidth increases by nearly two orders of magnitude with increasing atomic density and excitation strength, with corresponding suppression of resonant scattering and enhancement of off-resonant scattering. We attribute the increased linewidth to resonant dipole-dipole interactions of 18s atoms with spontaneously created populations of nearby $np$ states. Over a range of initial atomic densities and excitation strengths, the transition width is described by a single function of the steady- state density of Rydberg atoms, and the observed resonant excitation rate corresponds to that of a two-level system with the measured, rather than natural, linewidth. The broadening mechanism described here is likely to have negative implications for many proposals with coherently interacting Rydberg atoms.
Physical Review Letters


Rydberg atoms, Spectroscopy, Quantum information


Goldschmidt, E. , Boulier, T. , Brown, R. , Koller, S. , Young, J. , Gorshkov, A. , Rolston, S. and Porto, J. (2016), Anomalous broadening in driven dissipative Rydberg systems, Physical Review Letters (Accessed February 29, 2024)
Created March 16, 2016, Updated April 17, 2018