Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Echo spectroscopy and Atom Optics Billiards   We discuss a recently demonstrated type of microwave spectroscopy of trapped
ultra-cold atoms known as "echo spectroscopy" [M.F. Andersen et. al., Phys.
Rev. Lett., in press (2002)]. Echo spectroscopy can serve as an extremely
sensitive experimental tool for investigating quantum dynamics of trapped atoms
even when a large number of states are thermally populated. We show numerical
results for the stability of eigenstates of an atom-optics billiard of the
Bunimovich type, and discuss its behavior under different types of
perturbations. Finally, we propose to use special geometrical constructions to
make a dephasing free dipole trap.

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The categories of this paper are: cond-mat
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
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The categories of this paper are: q-bio
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The categories of this paper are: econ
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The categories of this paper are: solv-int
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The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: math