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Imaging the evolution of an ultracold strontium Rydberg gas

Xinyue Zhang, Patrick McQuillen, Trevor Strickler +2 more

APSMay 1, 20130 citations

Molecular resonances in the Rydberg-excitation spectrum of an ultracold Cs gas

Heiner Saßmannshausen

Jan 1, 20160 citations

Creation, Control, and Detection of Rydberg Excitations in Ultracold Strontium

J. D. Whalen, Roger Ding, Francisco Camargo +3 more

Bulletin of the American Physical SocietyJun 9, 20150 citations

Rydberg Molecules and Polarons in Ultracold Strontium Gases

Francisco Camargo

In this work I describe the excitation spectra of Rydberg atoms in ultracold gases of strontium and their decay mechanisms. In a few-body regime, we observe a highly structured spectrum re ecting excitation of ultralong-range molecules consisting of one or more ground-state atoms bound to the Rydberg core in potential wells formed by the Rydbergelectron wave function. In a many-body regime, with hundreds of ground-state atoms within the Rydberg orbital, the Rydberg atoms can be viewed as an impurity in a quantum gas, connecting to important concepts in condensed matter physics. The spectrum for impurity excitation displays signatures of polaronic states, in which the Rydberg atom signi cantly perturbs the density of the background gas. Additionally, decay channels of Rydberg excitations are examined by monitoring the time evolution of Rydberg populations. The measured lifetimes reveal new information on the decay processes of Rydberg molecules and place limits on the time scales over which studies involving Rydberg species in cold, dense atomic gases can be undertaken and limit the coherence times for such measurements.In this work I describe the excitation spectra of Rydberg atoms in ultracold gases of strontium and their decay mechanisms. In a few-body regime, we observe a highly structured spectrum re ecting excitation of ultralong-range molecules consisting of one or more ground-state atoms bound to the Rydberg core in potential wells formed by the Rydbergelectron wave function. In a many-body regime, with hundreds of ground-state atoms within the Rydberg orbital, the Rydberg atoms can be viewed as an impurity in a quantum gas, connecting to important concepts in condensed matter physics. The spectrum for impurity excitation displays signatures of polaronic states, in which the Rydberg atom signi cantly perturbs the density of the background gas. Additionally, decay channels of Rydberg excitations are examined by monitoring the time evolution of Rydberg populations. The measured lifetimes reveal new information on the decay processes of Rydberg molecules and place limits on the time scales over which studies involving Rydberg species in cold, dense atomic gases can be undertaken and limit the coherence times for such measurements.

Aug 7, 20171 citation

Production of ultra-long-range Rydberg molecules in a divalent atomic system

B. J. DeSalvo, J. A. Aman, F. B. Dunning +4 more

Sr 2 Rydberg molecules are created through two-photon excitation in an ultracold strontium gas contained in an optical dipole trap and are detected through atom loss from the trap. First order perturbation theory employing the Fermi pseudopotential and effective s-wave and p-wave scattering lengths is used to evaluate the binding energies of the molecular levels.

Journal of Physics Conference SeriesSep 7, 20151 citation

Ultralong-range Molecules in Strontium Rydberg Gases

T. C. Killian

Bulletin of the American Physical SocietyMay 25, 20160 citations

Molecular Spectra in an Ultracold Strontium Rydberg Gas

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