Journal
PHYSICA SCRIPTA
Volume 91, Issue 10, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0031-8949/91/10/104007
Keywords
Rydberg; ultracold atoms; spectroscopy; theory of atomic interactions
Categories
Funding
- ETH Research Grant [ETH-22 15-1]
- Swiss National Science Foundation [200020-159848]
- NCCR QSIT of the Swiss National Science Foundation
- EU Initial Training Network COHERENCE [FP7-PEOPLE-2010-ITN-265031]
- European Union H FET Proactive project RySQ [640378]
- Swiss National Science Foundation (SNF) [200020_159848] Funding Source: Swiss National Science Foundation (SNF)
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We present an overview over theoretical models to describe adiabatic potential-energy curves, experimental excitation spectra, and electronic and nuclear dynamics in interacting Rydberg-atom pairs at large internuclear separations. The potential-energy curves and molecular wavefunctions are determined from the multipole expansion of the static Coulomb interaction which is evaluated numerically in a product basis of atomic orbitals. The convergence of this approach both in the truncation of the multipole expansion as well as in the size of the product basis is discussed, and the comparison of simulated excitation spectra is established as a useful criterium to test the convergence of the calculation. We finally discuss the dynamics of electronic and nuclear motions of pairs of Rydberg atoms, focusing on the stability of ultralong range Rydberg molecules with respect to autoionization.
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