Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Weakly interacting Bose gas in the one-dimensional limit   We prepare a chemically and thermally one-dimensional (1d) quantum degenerate
Bose gas in a single microtrap. We introduce a new interferometric method to
distinguish the quasicondensate fraction of the gas from the thermal cloud at
finite temperature. We reach temperatures down to $kT\approx
0.5\hbar\omega_\perp$ (transverse oscillator eigenfrequency $\omega_\perp$)
when collisional thermalization slows down as expected in 1d. At the lowest
temperatures the transverse momentum distribution exhibits a residual
dependence on the line density $n_{1d}$, characteristic for 1d systems. For
very low densities the approach to the transverse single particle ground state
is linear in $n_{1d}$.

21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
3
The categories of this paper are: physics
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con