Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 15: Ultracold plasmas and Rydberg systems II (with A)
Q 15.6: Vortrag
Montag, 17. März 2014, 15:15–15:30, DO24 1.101
Generating heavy-tailed disorder in Rydberg aggregates — •Sebastian Möbius1, Sebastiaan M. Vlaming1, Victor A. Malyshev2, Jasper Knoester2, and Alexander Eisfeld1 — 1Max Planck Intitute for physics of complex systems, Dresden, Germany — 2Centre for Theoretical Physics and Zernike Institute for Advanced Materials, University of Groningen, Netherlands
Molecular aggregates exhibit extraordinary absorption properties, depending on their geometrical conformation and inter-monomeric coupling. The narrowing of the absorption band for J-aggregates can be well described by diagonal Gaussian static disorder for individual site energies. Recent studies by Eisfeld et. al [1] have shown, that Levy stable distributions (LSD), a generalization of the Gaussian case, may also lead to a broadening of the absorption band.
Recent developments in generating and trapping highly excited Rydberg atoms, allow for quantum simulations of these molecular aggregates. We show that the interaction of Rydberg atoms with a background gas leads to heavy-tailed disorder in the energy spectrum. Depending on the species of the background gas and the preparation of the system different kinds of heavy-tailed disorder can be observed, including LSD.
[1] A. Eisfeld, S.M. Vlaming, V.A. Malyshev, J. Knoester, PRL 105, 137402 (2010)