Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 23: Poster 2: Intersectional Session
Q 23.23: Poster
Dienstag, 15. März 2011, 18:00–21:00, P1
Coherent Rydberg Excitation in Thermal Microcells — •Renate Daschner1, Harald Kübler1, Bernhard Huber1, Thomas Baluktsian1, Andreas Kölle1, James P. Shaffer2, Robert Löw1, and Tilman Pfau1 — 15. Physikalisches Institut, Universität Stuttgart, Germany — 2Homer L. Dodge Department of Physics and Astronomy, The University of Oklahoma, USA
In order to create quantum devices based on the Rydberg blockade mechanism, it is necessary to have a confinement of the excitation volume to less than the blockade radius in a frozen gas of atoms; i.e. the excitation times need to be shorter than the timescales of the respective dephasing mechanisms.
While ultracold gases seem to be the obvious choice, our approach utilizes thermal atomic vapor in small glass cells [1] which offer multiple advantages like good optical access and scalability. Such a system can be realized by confining the atoms to geometries in the µm regime.
Decoherence effects like resonant interactions of the Rydberg atoms with polaritonic excitations in the glass have been studied and can be minimized by the appropriate choice of Rydberg states [2].
Using a bandwidth-limited pulsed laser system for the Rydberg excitation we observe coherent Rabi oscillations on the nanosecond timescale.
We discuss future perspectives for Quantum information processing.
[1] Baluktsian, T., et. al. Opt. Lett. 35, 1950 (2010)
[2] Kübler, H., et. al. Nature Photon. 4, 112-116 (2010)