We demonstrate that weak magnetic fields can significantly enhance laser cooling and state preparation of Cs atoms in a one-dimensional optical lattice. A field parallel to the lattice axis increases the vibrational ground-state population of the stretched state |m = F) to 28%. A transverse field reduces the kinetic temperature. Quantum Monte Carlo simulations agree with the experiment, and predict 45% ground-state population for optimal parallel and transverse fields. Our results show that coherent mixing and local energy relaxation play important roles in laser cooling of large-F atoms.
|Original language||English (US)|
|Journal||Physical Review A|
|Publication status||Published - Feb 1998|
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics