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- W2000048498 abstract "Laser cooling to sub-Doppler temperatures by optical molasses is thought to be inhibited in atoms with unresolved, near-degenerate hyperfine structure in the excited state. We demonstrate that such cooling is possible in one to three dimensions, not only near the standard D2 line for laser cooling, but over a range extending to the D1 line. Via a combination of Sisyphus cooling followed by adiabatic expansion, we reach temperatures as low as 40 mu K, which corresponds to atomic velocities a factor of 2.6 above the limit imposed by a single photon recoil. Our method requires modest laser power at a frequency within reach of standard frequency locking methods. It is largely insensitive to laser power, polarization and detuning, magnetic fields, and initial hyperfine populations. Our results suggest that optical molasses should be possible with all alkali species." @default.
- W2000048498 created "2016-06-24" @default.
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- W2000048498 date "2014-02-10" @default.
- W2000048498 modified "2023-09-26" @default.
- W2000048498 title "Sisyphus cooling of lithium" @default.
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- W2000048498 doi "https://doi.org/10.1103/physreva.89.023409" @default.
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