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SUMMARY:Quantum magnetism with Rydberg-dressed ground state atoms
DESCRIPTION:Atoms excited to Rydberg states with high principal quantum numbers n = 20 .. 100 acquire some extreme properties, such as the van der Waals interactions whose strength scales with a formidable n^11. Consequently, two Rydberg atoms can influence each other significantly over a distance of several micrometers, which is sufficient for atoms in optical lattices to interact directly across several lattice sites. Together with great tunability via external fields, Rydberg atoms provide a promising toolbox to engineer interactions and study quantum magnetism in ultracold atomic experiments.
In this talk we take a closer look at how the huge interaction strengths can be harvested to engineer effective spin-spin interactions between ground state atoms [1, 2]. We employ off-resonant laser-dressing of the ground state atoms to Rydberg P-states, giving rise to Ising-type interactions as well as exchange interactions. We show how the effectiveness of the Rydberg dressing technique can be greatly enhanced by exploiting Förster resonances occuring naturally in the pair potential spectrum of rubidium. Finally, some exciting results leading towards a first experimental realisation will be presented.
LOCATION:Erwin Schrödinger Saal
DTSTART:20150925T110000
DTEND:20150925T120000
TZID: Europe/Vienna
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