Date : 10-04-2017
Time : 00:14:30
Speaker : Prof. Anders Kastberg
Area : Atomic, Molecular and Optical Physics
Venue : Room 469, fourth floor, PRL Main building
In this seminar, I will review the physical processes leading to
”sub-Doppler” temperatures in laser cooled atom. These processes are
generally accepted to be well described by sop called ”Sisyphus
cooling”. However, recent experimental and theoretical findings show
that the Sisyphus model is at best a partial explanation for the
relevant light-atom interaction.
Aside from the purely academic question about the nature of the
cooling process, there are indications, partially controversial, that
the ensuing momentum distribution in the atomic cloud follows a power
law. This could in turn makes such samples good candidate for
fundamental studies of anomalous diffusion and non-ergodicity.
Moreover, the acute sensitivity of the cooling process on the exact
atomic structure may also provide a tool for precession spectroscopy.