Abstract
Measurements at the NBS first showed that the 3-D laser cooling of atoms results in temperatures that are lower than the Doppler cooling limit for two-level atoms. We propose a new cooling mechanism that depends on the Zeeman sublevels of the atoms to explain the low temperatures.1 It can be understood by noting that the atom will optically pump predominately into the most Stark shifted ground states, corresponding to an alignment of the atomic dipole moment with the driving laser field.
© 1989 Optical Society of America
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