Rydberg trimers and excited dimers bound by internal quantum reflection

Details Rydberg trimers and excited dimers bound by internal quantum reflection Rydberg trimers and excited dimers bound by internal quantum reflection

2009-12-20

arxiv.org/abs/0912.4058v1

Physics

Atomic Physics

6 pages, 3 figures, 1 table

Scientific paper

10.1103/PhysRevLett.105.163201

Quantum reflection is a pure wave phenomena that predicts reflection of a particle at a changing potential for cases where complete transmission occurs classically. For a chemical bond, we find that this effect can lead to non-classical vibrational turning points and bound states at extremely large interatomic distances. Only recently has the existence of such ultralong-range Rydberg molecules been demonstrated experimentally. Here, we identify a broad range of molecular lines, most of which are shown to originate from two different novel sources: a single-photon associated triatomic molecule formed by a Rydberg atom and two ground state atoms and a series of excited dimer states that are bound by a so far unexplored mechanism based on internal quantum reflection at a steep potential drop. The properties of the Rydberg molecules identified in this work qualify them as prototypes for a new type of chemistry at ultracold temperatures.

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