A new graph-theoretic framework provides a unified description of atom-light interactions across regimes ranging from weak to deep-strong coupling.

A research team comprising professors Sunkyu Yu and Namkyoo Park of the Department of Electrical and Computer Engineering at Seoul National University College of Engineering and professor Xianji Piao of the University of Seoul has discovered that even the interaction between a single atom and light—one of the simplest settings in quantum physics—contains an enormous, intricately connected network.

The study was published Sept. 25 in the journal Science Advances.