Heidelberg 2015 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster: Quantum Optics and Photonics III

Q 62.2: Poster

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

Dipolar exchange in interacting Rydberg gases — •Miguel Ferreira-Cao, Georg Günter, Hanna Schempp, María M. Valado, Vladislav Gavryusev, Gerhard Zürn, Shannon Whitlock, and Matthias Weidemüller — Physikalisches Institut, Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany

Dipolar exchange interactions play an important role in diverse systems ranging from polar molecules to molecular aggregates, light-harvesting complexes or quantum dots [1]. Ultracold Rydberg atoms offer an ideal system to study dipolar energy transport under the influence of a controlled environment [2].

We have performed measurements of microwave driven Rabi oscillations between Rydberg states with angular momentum state s and p in which interactions lead to reduced contrast for high Rydberg densities. This system constitutes a realization of a XY spin model with long-range and anisotropic spin-spin interactions [3,4]. The build-up of correlated phases of the spin distribution is an important aspect under investigation. Applying tomographic methods, future measurements can reveal the time-dependent properties of the many-body state.

[1] B. Yan et al., Nature 501, 521-525 (2013)

[2] G. Günter et al., Science 342, 954 (2013)

[3] D. Maxwell et al., Phys. Rev. Lett. 110, 103001 (2013)

[4] D. Barredo et al., arXiv:1408.1055 (2014)