A Rydberg molecule is a type of exotic molecule formed from atoms in highly excited electronic states known as Rydberg states. Rydberg atoms are characterized by having one or more electrons in very high principal quantum states, which means these electrons are far from the nucleus and possess a large principal quantum number. This results in unique properties, such as a dramatically increased size and sensitivity to external electric and magnetic fields. Rydberg molecules can form when two or more Rydberg atoms interact.
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