Speaker
Description
In the BCS limit density profiles for unpolarized trapped fermionic clouds of atoms are
largely featureless. Therefore, it is a delicate task to analyze them in order to quantify
their respective interaction and temperature contributions. Temperature measure-
ments have so far been mostly considered in an indirect way, where one sweeps
isentropically from the BCS to the BEC limit. Instead we suggest here a direct
thermometry, which relies on measuring the line density and comparing the obtained
data with a Hartree-Bogoliubov mean-field theory combined with a local density
approximation. In case of an attractive interaction between two-components of 6 Li
atoms trapped in a tri-axial harmonic confinement we show that minimizing the error
within such an experiment-theory collaboration turns out to be a reasonable criterion
for analyzing in detail measured densities and, thus, for ultimately determining the
sample temperatures. The findings are discussed in view of various possible sources
of errors.
Short bio (50 words) or link to website
https://www-user.rhrk.uni-kl.de/~apelster
| Career stage | Postdoc |
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