(See also the article on the Rydberg atom).

The peculiar properties of the Rydberg atom come from the large charge separation and the resulting hydrogenic potential.

There, the interaction between a Rydberg atom and a ground state atom leads to a novel bond type.

A Rydberg atom is an excited atom with one or more electrons that have a very high principal quantum number.

Due to their large size, Rydberg atoms can exhibit very large electric dipole moments.

Calculations using perturbation theory show that this results in strong interactions between two close Rydberg atoms.

Strongly interacting Rydberg atoms also feature quantum critical behavior, which makes them interesting to study on their own.

An atom in a high excited state is termed Rydberg atom.

Rydberg atoms are an example of metastable excited atomic states.

Rydberg atom (an atom in a state of high principal quantum number)