Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Suppression of collisional decoherence   We employ a continuous dynamical decoupling scheme to suppress the
decoherence induced by elastic collisions of cold atoms. Using a continuous
echo pulse we achieve a thirty-fold increase in the coherence time of Rb87
atoms trapped in a dipole trap. Coherence times of more than 100ms are
demonstrated for an ensemble with an optical depth of 120.

20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat