Time dependence of laser cooling in optical lattices
2005 (English)In: Europhysics letters, ISSN 0295-5075, E-ISSN 1286-4854, Vol. 72, no 3, 369-375 p.Article in journal (Refereed) Published
We study the dynamics of the cooling of a gas of caesium atoms in an optical lattice, both experimentally and with 1D full-quantum Monte Carlo simulations. We find that, contrary to the standard interpretation of the Sisyphus model, the cooling process does not work by a continuous decrease of the average kinetic energy of the atoms in the lattice. Instead, we show that the momentum of the atoms follows a bimodal distribution, the atoms being gradually transferred from a hot to a cold mode. We suggest that the cooling mechanism should be depicted in terms of a rate model, describing the transfer between the two modes along with the processes occurring within each mode.
Place, publisher, year, edition, pages
Les Ulis: Éditions de physique , 2005. Vol. 72, no 3, 369-375 p.
Atom and Molecular Physics and Optics
Research subject Physics
IdentifiersURN: urn:nbn:se:umu:diva-2331DOI: 10.1209/epl/i2005-10244-6OAI: oai:DiVA.org:umu-2331DiVA: diva2:140284