Physics – Quantum Physics
Scientific paper
2007-05-24
better, condensed version published in PRA 77, 023402 (2008)
Physics
Quantum Physics
18 pages, 10 figures
Scientific paper
10.1103/PhysRevA.77.023402
Cooling of molecules via free-space dissipative scattering of photons is thought not to be practicable due to the inherently large number of Raman loss channels available to molecules and the prohibitive expense of building multiple repumping laser systems. The use of an optical cavity to enhance coherent Rayleigh scattering into a decaying cavity mode has been suggested as a potential method to mitigate Raman loss, thereby enabling the laser cooling of molecules to ultracold temperatures. We discuss the possibility of cavity-assisted laser cooling particles without closed transitions, identify conditions necessary to achieve efficient cooling, and suggest solutions given experimental constraints. Specifically, it is shown that cooperativities much greater than unity are required for cooling without loss, and that this could be achieved via the superradiant scattering associated with intracavity self-localization of the molecules. Particular emphasis is given to the polar hydroxyl radical (OH), cold samples of which are readily obtained from Stark deceleration.
Domokos Peter
Hudson Eric R.
Lev Benjamin L.
Ritsch Helmut
Sawyer Brian C.
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