Mesoscopic Rydberg Impurity in an Atomic Quantum Gas
Sadeghpour, H. R.
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CitationSchmidt, Richard, H. R. Sadeghpour, and E. Demler. 2016. “Mesoscopic Rydberg Impurity in an Atomic Quantum Gas.” Physical Review Letters 116 (10). https://doi.org/10.1103/physrevlett.116.105302.
AbstractGiant impurity excitations are powerful probes for exploring new regimes of far out of equilibrium dynamics in few-and many-body quantum systems, and in situ observations of correlations. Motivated by recent experimental progress in spectroscopic studies of Rydberg excitations in ultracold atoms, we develop a new theoretical approach for describing multiscale dynamics of Rydberg excitations in quantum Bose gases. We find that the crossover from few-to many-body dynamics manifests in a dramatic change in spectral profile from resolved molecular lines to broad Gaussian distributions representing a superpolaronic state in which many atoms bind to the Rydberg impurity. We discuss signatures of this crossover in the temperature and density dependence of the spectra.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41412127
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