Magneto-Optical Trap (MOT)
The standard first step for cooling neutral atoms: six laser beams and a magnetic field gradient that chill millions of atoms to microkelvin temperatures.
A magneto-optical trap, or MOT, is the standard first step for cooling neutral atoms. Six laser beams intersect at the center of a magnetic field gradient; atoms that drift away from the center preferentially absorb photons that push them back. The result is a glowing ball of millions of atoms chilled to microkelvin temperatures, visible to the naked eye as a tiny fluorescent cloud.
Nearly every cold-atom technology starts here: neutral-atom quantum computers, atomic clocks, quantum sensors, Bose-Einstein condensates. The MOT was developed in the late 1980s in part at Bell Labs and JILA, and Boulder has been refining the recipe ever since. Atom Computing and Infleqtion both load their machines from MOTs; Infleqtion's compact cold-atom hardware is, at heart, a miniaturized MOT supply chain.