Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 55: Poster II
Q 55.25: Poster
Donnerstag, 11. März 2010, 16:00–19:00, Lichthof
Coherent Processes in the Presence of Interparticle Interactions — •Hanna Schempp1, Georg Günter1, Christoph S. Hofmann1, Nele Müller1, Christian Giese1, Sebastian D. Saliba1, Brett D. DePaola1, Sevilay Sevincli2, Thomas Pohl2, Thomas Amthor1, and Matthias Weidemüller1 — 1Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg — 2Max-Planck-Institut für Physik Komplexer Systeme, Nöthnitzer Str. 38, 01187 Dresden
We report on coherent processes in ultracold Rydberg gases, namely Rabi oscillations between ground and Rydberg state [1], Rapid Adiabatic Passage [2] and Coherent Population Trapping (CPT). In the presence of interparticle interactions the coherence of these processes is reduced and correlations among the particles play a role. Van der Waals interactions between Rydberg atoms can precisely be adjusted by varying the atom density and the principal quantum number. Thus Rydberg atoms provide an excellent tool to systematically tune the interparticle interactions. We show experimental results on CPT with controlled interparticle interactions and present a many-body model that reproduces the measured features [3].
[1] M. Reetz-Lamour et al., Phys. Rev. Lett. 100, 253001 (2008)
[2] J. Deiglmayr et al., Opt. Comm. 264, 293 (2006)
[3] H. Schempp et al., submitted (2009)