Dresden 2011 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 13: Poster II

A 13.11: Poster

Dienstag, 15. März 2011, 18:00–20:00, P1

Contolling a bond with light: Ultralong-range Rydberg molecules — •Johannes Nipper, Björn Butscher, Jonathan Balewski, Robert Löw, and Tilman Pfau — 5. Physikalisches Institut, Universität Stuttgart, Germany

We report on experiments exploring ultralong-range Rydberg molecules. These unusual bound states between Rydberg atoms and ground state atoms feature novel binding mechanisms based on low energy electron scattering as well as internal quantum reflection at a shape resonance of electron-atom scattering [1].

Besides the binding energies of dimer and trimer states, further properties are studied in high resolution spectra in the high density regime. This extends from density dependend lifetime measurements to experiments in electric fields that reveal a molecular Stark effect due to a permanent electric dipole moment of the molecules.

The possibility to coherently control this binding mechanism is shown in Rotary echo and Ramsey experiments and the coherence times are extracted [2].

[1] V.Bendkowsky et.al., PRL 105, 16 (2010)

[2] B.Butscher et.al., Nature Physics, nphys1828 (2010)