Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 17: Rydberg atoms
A 17.2: Vortrag
Dienstag, 7. März 2017, 14:45–15:00, N 3
Rydberg molecule-induced remote spin-flips — •Carsten Lippe1, Thomas Niederprüm1, Oliver Thomas1,2, Tanita Eichert1, and Herwig Ott1 — 1Department of Physics and research center OPTIMAS, University of Kaiserslautern — 2Graduate School Materials Science in Mainz, Staudingerweg 9, 55128 Mainz
We have performed high resolution photoassociation spectroscopy of 87Rb Rydberg molecules in the vicinity of the 25P state. These exotic states originate from the scattering interaction between a ground state atom located within the electronic wave function of a second atom in a highly excited Rydberg state and the Rydberg electron.
We have investigated two different types of molecular states: Butterfly Rydberg molecules originate from a shape resonance in the p-wave scattering channel and are thus much more deeply bound than the second type, ultra-long range molecules.
For the former, we measured bond lengths in the range of 100 a0 to 350 a0 and permanent electric dipole moments of around 500 Debye.
For the latter, we find potentials containing contributions of both hyperfine states of the ground state perturber atom due to the hyperfine interaction.
Depending on the relative strength of the scattering interaction compared to the hyperfine splitting we identify two distinct regimes where entanglement and spin-flips occur, respectively. Remote spin-flips in the perturber atom can be induced by excitation of Rydberg molecules when the hyperfine interaction dominates the scattering interaction, leading to a possible implementation of long-range spin-dependent interactions for ultracold atoms.