In physics, a Feshbach resonance can occur upon collision of two slow atoms when they temporarily stick together forming an unstable compound with short lifetime (so-called resonance). 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.
In physics, a Feshbach resonance can occur upon collision of two slow atoms when they temporarily stick together forming an unstable compound with short lifetime (so-called resonance). 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.
Source: Wikipedia "Feshbach resonance" · CC BY-SA 4.0
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