Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 26: Ultracold Plasmas and Rydberg Systems II (joint session Q/A)

Q 26.5: Talk

Monday, March 5, 2018, 17:15–17:30, K 2.013

Self-consistent theory of energy diffusion in ultracold Rydberg gases — •Katharina Hess, Andreas Buchleitner, and Thomas Wellens — Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Herman-Herder-Straße 3, 79104 Freiburg, Deutschland

Due to their high degree of controllability, gases of ultracold Rydberg atoms are a good testbed to study fundamental questions of transport in spatially disordered quantum networks. In this talk, we will examine the transfer of a single Rydberg excitation mediated by coherent dipole-dipole interactions. We show that the dipole blockade effect can be used to change the character of transport from subdiffusive to diffusive [1]. In the latter case, we apply a self-consistent diagrammatic approach [2] in order to determine the value of the diffusion constant.

[1] T. Scholak, T. Wellens and A. Buchleitner, Phys. Rev. A 90, 063415 (2014)

[2] T. Wellens and R. A. Jalabert, Phys. Rev. B 94, 144209 (2016)