Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Velocimetry of cold atoms by matterwave interferometry   We present an elegant application of matterwave interferometry to the
velocimetry of cold atoms whereby, in analogy to Fourier transform
spectroscopy, the 1-D velocity distribution is manifest in the frequency domain
of the interferometer output. By using stimulated Raman transitions between
hyperfine ground states to perform a three-pulse interferometer sequence, we
have measured the velocity distributions of clouds of freely-expanding
$^{85}$Rb atoms with temperatures of 33 $\mu$K and 17 $\mu$K. Quadrature
measurement of the interferometer output as a function of the temporal
asymmetry yields velocity distributions with excellent fidelity. Our technique,
which is particularly suited to ultracold samples, compares favourably with
conventional Doppler and time-of-flight techniques, and reveals artefacts in
standard Raman Doppler methods. The technique is related to, and provides a
conceptual foundation of, interferometric matterwave accelerometry, gravimetry
and rotation sensing.

25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph