Erlangen 2018 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 39: Precision Spectroscopy VI - neutrals and ions (joint session A/Q)

A 39.2: Vortrag

Donnerstag, 8. März 2018, 14:30–14:45, K 1.016

A Network Approach to Atomic Spectra — •David Wellnitz¹, Julian Heiss¹, Armin Kekić^{1, 2}, Sebastian Lackner³, Andreas Spitz³, Michael Gertz³, and Matthias Weidemüller^{1, 4} — ¹Physikalisches Institut, Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany — ²École Normale Supérieure, Paris, Frankreich — ³Institut für Informatik, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany — ⁴Shanghai Branch, University of Science and Technology of China, Shanghai 201315, China

We demonstrate a network-inspired approach for treating atomic spectroscopy data. Nodes of the network represent states, while links represent transitions between them. We find that such spectroscopic networks exhibit an anti-community structure, microscopically characterized by equal quantum numbers of the electronic angular momentum. Using state-of-the-art methods for link prediction, transitions missing in the data can be identified without having to rely upon a microscopic model of the atom. We apply our methods to spectroscopic networks of hydrogen, helium and iron. Implications of our network approach for understanding complex atomic structure are discussed.