Mainz 2017 – scientific programme

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A: Fachverband Atomphysik

A 20: Poster Session I

A 20.5: Poster

Tuesday, March 7, 2017, 17:00–19:00, P OG1

Diatomic and triatomic ultra long-ranged Rydberg molecules — •Frederic Hummel¹, Christian Fey¹, and Peter Schmelcher^{1, 2} — ¹Zentrum für Optische Quantentechnologien, Universität Hamburg — ²The Hamburg Centre for Ultrafast Imaging, Universität Hamburg

We present recent results of our study of ultra long-range Rydberg molecules (ULRM), which include polyatomic molecules with spin dependent interactions as well as their stretching and bending dynamics. An ULRM is the manifestation of a novel molecular binding mechanism occuring in ultra cold atomic quantum gases due to the scattering of an exited Rydberg electron with neutral ground state atoms in its vicinity. The diverse potential energy landscapes arising from Born-Oppenheimer approximation gives way to a plethora of molecular states, partly with, for all practical purposes, large permanent electric dipole moments in the kilo Debye magnitude, even for homonuleic systems. Typical binding energies range from 10 up to 10⁴ MHz for so called Butterfly molecules. Inculsion of fine- and hyperfine structure can lead to longrange spin-spin interaction between the Rydberg and neutral atom with typical separations of 400-1000 atomic units.