Collective Excitation of Rydberg-Atom Ensembles beyond the Superatom Model

Gärttner, Martin; Whitlock, Shannon; Schönleber, David W.; Evers, J.

doi:10.1103/PhysRevLett.113.233002

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Collective Excitation of Rydberg-Atom Ensembles beyond the Superatom Model

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Gärttner, Martin
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

Schönleber, David W.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;
Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Straße 38, 01187 Dresden, Germany;

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Evers, J.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

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Citation

Gärttner, M., Whitlock, S., Schönleber, D. W., & Evers, J. (2014). Collective Excitation of Rydberg-Atom Ensembles beyond the Superatom Model. Physical Review Letters, 113(23): 233002. doi:10.1103/PhysRevLett.113.233002.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-4F34-8

Abstract

In an ensemble of laser-driven atoms involving strongly interacting Rydberg states, the excitation probability is usually strongly suppressed. In contrast, here we identify a regime in which the steady-state Rydberg excited fraction is enhanced by the interaction. This effect is associated with the build-up of many-body coherences, induced by coherent multi-photon excitations between collective states. The excitation enhancement should be observable under currently-existing experimental conditions, and may serve as a direct probe for the presence of coherent multi-photon dynamics involving collective quantum states.