Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interferometric laser cooling of atomic rubidium   We report the 1-D cooling of $^{85}$Rb atoms using a velocity-dependent
optical force based upon Ramsey matter-wave interferometry. Using stimulated
Raman transitions between ground hyperfine states, 12 cycles of the
interferometer sequence cool a freely-moving atom cloud from $21~\mu$K to
$3~\mu$K. This pulsed analog of continuous-wave Doppler cooling is effective at
temperatures down to the recoil limit; with augmentation pulses to increase the
interferometer area, it should cool more quickly than conventional methods, and
be more suitable for species that lack a closed radiative transition.

9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex