title: Ultra-long-range Rydberg trimers with a repulsive two-body interaction.
abstract: A Rydberg and a ground-state atom can form ultra-long-range diatomic molecules provided the interaction between the ground-state atom and the Rydberg electron is attractive [C. H. Greene, Phys. Rev. Lett. 85, 2458 (2000)10.1103/PhysRevLett.85.2458]. A repulsive interaction does not support bound states. However, as we will show, adding a second ground-state atom, a long-range bound triatomic molecule becomes possible.
authors.affiliation: Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, D-01187 Dresden, Germany.
authors.forename: Ivan C H
authors.initials: IC
authors.lastname: Liu
authors.forename: Jovica
authors.initials: J
authors.lastname: Stanojevic
authors.forename: Jan M
authors.initials: JM
authors.lastname: Rost