Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 36: Poster: Ultra-cold plasmas and Rydberg systems (with Q)

A 36.3: Poster

Donnerstag, 26. März 2015, 17:00–19:00, C/Foyer

Characteristics of Rydberg aggregation in vapor cells — •Alban Urvoy1, Fabian Ripka1, Igor Lesanovsky2, Donald W. Booth3, James P. Shaffer3, Tilman Pfau1, and Robert Löw115. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany — 2School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK — 3Homer L. Dodge Department of Physics and Astronomy, The University of Oklahoma, 440 West Brooks Street, Norman, Oklahoma 73019, USA

Vapor cells present the advantage of offering compact and flexible experimental arrangements, as well as parameter regimes that are complementary to cold atom experiments. Several important results have already been obtained with van-der-Waals interacting Rydberg atoms in vapor cells [1,2], in spite of the strong effects due to thermal motion of the atoms.
Here we present our results at higher densities on the excitation dynamics of Rydberg aggregates in a vapor cell [3]. In particular, we will focus on the specifics of the aggregation in our configuration. We will examine the influence of complex Rydberg interactions at these high densities, such as the symmetry-breaking dipole-quadrupole interaction. We will also discuss the definition of aggregates when thermal motion is non-negligible and the influence of having predominantly motional dephasing rather than laser dephasing.

[1] T. Baluktsian, B. Huber, et al., PRL 110, 123001 (2013)

[2] C. Carr et al., PRL 111, 113901 (2013)

[3] A. Urvoy et al., arXiv:1408.0039 [physics.atom-ph] (2014)

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