Feshbach resonance

English

Etymology

Named after American physicist Herman Feshbach.

Noun

Feshbach resonance (countable and uncountable, plural Feshbach resonances)

1. (physics) The situation where two slow atoms collide and temporarily stick together, forming an unstable compound with a short lifetime. It is a feature of many-body systems in which a bound state is achieved if the coupling(s) between at least one internal degree of freedom and the reaction coordinates, which lead to dissociation, vanish.

   Synonym: Fano-Feshbach resonance

   Coordinate term: shape resonance