Quantum billiard balls: Digging deeper into light-assisted atomic collisions

When atoms collide, their exact structure--for example, the number of electrons they have or even the quantum spin of their nuclei--has a lot to say about how they bounce off each other. This is especially true for atoms cooled to near-zero Kelvin, where quantum mechanical effects give rise to unexpected phenomena. Collisions of these cold atoms can sometimes be caused by incoming laser light, resulting in the colliding atom-pair forming a short-lived molecular state before disassociating and re...