Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of Interactions on the Critical Temperature of a Trapped Bose
  Gas   We perform high-precision measurements of the condensation temperature of a
harmonically-trapped atomic Bose gas with widely-tuneable interactions. For
weak interactions we observe a negative shift of the critical temperature in
excellent agreement with mean-field theory. However for sufficiently strong
interactions we clearly observe an additional positive shift, characteristic of
beyond-mean-field critical correlations. We also discuss non-equilibrium
effects on the apparent critical temperature for both very weak and very strong
interactions.

18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex