Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlinear Bose-Einstein-condensate Dynamics Induced by a Harmonic
  Modulation of the s-wave Scattering Length   In a recent experiment, a Bose-Einstein condensate of Li7 has been excited by
a harmonic modulation of the atomic s-wave scattering length via Feshbach
resonance. By combining an analytical perturbative approach with extensive
numerical simulations we analyze the emerging nonlinear dynamics of the system
on the mean-field Gross-Pitaevskii level at zero temperature. Resulting
excitation spectra are presented and prominent nonlinear features are found:
mode coupling, higher harmonics generation and significant shifts in the
frequencies of collective modes. We indicate how nonlinear dynamical properties
could be made clearly observable in future experiments and compared to our
results.

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The categories of this paper are: nlin
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
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The categories of this paper are: stat
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th