Hamburg 2009 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 56: Poster IV

Q 56.27: Poster

Donnerstag, 5. März 2009, 16:30–19:00, VMP 9 Poster

Interaction-induced dynamics in ultracold Rydberg gases — •Thomas Amthor, Christian Giese, Christoph S. Hofmann, Hanna Schempp, Wendelin Sprenger, Janne Denskat, Markus Reetz-Lamour, and Matthias Weidemüller — Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg

We present experimental results and model calculations on coherent and incoherent dynamics of an ultracold interacting ⁸⁷Rb Rydberg gas. Long-range interactions among Rydberg atoms are shown to cause both suppression and enhancement of excitation. Coherence in the excitation to Rydberg states is demonstrated by direct observation of Rabi cycles [1]. Spectroscopic time-resolved measurements of the ionization dynamics reveal interaction-induced motion of the atoms [2] and different excitation schemes are explored which allow for the manipulation of the pair distance distribution. Furthermore, we discuss the dynamics of resonant energy transfer in unordered and ordered systems of Rydberg atoms, which involves model calculations of many-particle clouds and chains with excitation traps [3].

[1] M. Reetz-Lamour et al., Phys. Rev. Lett. 100, 253001 (2008)

[2] T. Amthor et al., Phys. Rev. Lett. 98, 023004 (2007)

[3] O. Mülken et al., Phys. Rev. Lett. 99, 090601 (2007)