Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 4: Ultracold Plasmas and Rydberg Systems I (joint session Q/A)
A 4.2: Vortrag
Montag, 5. März 2018, 11:00–11:15, K 2.013
Excitation blockade in highly Stark-shifted Rydberg states — •Raphael Nold, Markus Stecker, Lea Steinert, József Fortágh, and Andreas Günther — Center for Quantum Science, Physikalisches Institut, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen
We report on the observation of excitation blockade for strongly Stark-shifted Rydberg states. Therefore, we make use of the fact that even for electric fields above the classical ionization limit, there are long-living Rydberg states with small ionization rates. We have developed a detection scheme for controlled ionization and magnified imaging of those states with high spatial and temporal resolution by adiabatic transfer to a state with a suitable ionization rate. The detector consists of a high-resolution ion microscope for ground state and Rydberg atoms with magnifications up to 1000 and a spatial resolution in the 100nm regime. The blockade effect becomes evident in the spatial g(2) correlation function between individual detection events. We show that the strength of the blockade effect can be sensitively adjusted by small changes in the electric field strength. This opens up new perspectives for quantum simulation techniques.