Mainz 2017 – scientific programme

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A: Fachverband Atomphysik

A 25: Ultracold Plasmas and Rydberg Systems (with Q)

A 25.7: Talk

Wednesday, March 8, 2017, 16:15–16:30, P 104

Mixed spin character bound states in ultra-long range giant dipole molecules — •Thomas Stielow, Markus Kurz, and Stefan Scheel — Institut für Physik, Universität Rostock, Albert-Einstein-Str. 23-24, 18059 Rostock

An exotic species of Rydberg atoms in crossed eletric and magnetic fields are so-called giant-dipole atoms [1]. They are characterized by an electron-ionic core separation in the range of several micrometers, leading to huge permanent dipole moments of several hundred thousand Debye. Recently, diatomic molecular states formed by the binding of a giant-dipole atom with a neutral ground-state perturber have been analyzed within the framework of a triplet dominated S-wave Fermi-pseudopotential approach [2]. In this work, we expand this analysis by including both S- and P-wave scattering potentials along with the hyperfine-structure coupling of the ground-state perturber. We discuss the effects of these couplings on the adiabatic molecular potentials. In addition to the Fermi-pseudopotential ansatz we provide a comparative study based on a Green’s function approach [3].

[1] Dippel O., Schmelcher P. and Cederbaum L. S., Phys. Rev. A, 49 (1994) 4415.

[2] Kurz, M., Mayle, M. and Schmelcher, P., Europhys. Lett., 97 (2012) 43001.

[3] Fey, C., Kurz, M., Schmelcher, P., Rittenhouse, S. T., Sadeghpour, H. R., New J. Phys. 17 055010 (2015).