Why is a MOT required?
- Prerequisite of single-atom optical tweezer
Laser
- Cooler: red-detuned cyclic transition → Doppler cooling
- Repump: from dark state to cyclic transit state.
Laser cooling - Optical molasses (OM)
Magneto-optical trap (MOT)
$$
\omega_L' = \omega_L-\vec{k}\cdot \vec{v}
$$
required detuning for cooling…