Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasi one-dimensional diffuse laser cooling of atoms   We demonstrate experimentally the generation of one-dimensional cold gases of
$^{87}$Rb atoms by diffuse laser cooling (DLC). A horizontal slender vacuum
glass tube with length of 105~cm and diameter of 2~cm is used in our
experiment. The diffuse laser light inside the tube, which is generated by
multi-reflection of injected lasers, cools the background vapor atoms. With
250~mW of cooling light and 50~mW of repumping light, an evenly distributed
meter-long profile of atom cloud is obtained. We observe a factor 4 improvement
on the atomic OD for a typical cooling duration of 170~ms and a sub-Doppler
atomic temperature of 25~$\mu$k. The maximum number of detected cold atoms
remain constant for a free-fall duration of 30~ms. Such samples are ideal for
many quantum optical experiments involving electromagnetically induced
transparency, electronically highly excited (Rydberg) atoms and quantum
precision measurements.

14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an