Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Parametric Resonance Phenomena in Bose-Einstein Condensates: Enhanced
  Quantum Tunneling of Coherent Matter Pulses   We investigate the quantum tunneling of a Bose-Einstein condensate confined
in a optical trap. We show that periodic pulses of coherent matter are emitted
from the trap by using an oscillating energy barrier. Moreover, the emitted
fraction of condensed atoms strongly increases if the period of oscillation of
the height of the energy barrier is in parametric resonance with the period of
oscillation of the center of mass of the condensate inside the potential well.
Our model is analyzed by numerically solving the nonpolynomial Schrodinger
equation (NPSE), an effective one-dimensional equation which describes the
macroscopic wavefunction of Bose condensates under transverse harmonic
confinement. The range of validity of NPSE is discussed and compared with that
of Gross-Pitaevskii equation.

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The categories of this paper are: bayes-an
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
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The categories of this paper are: adap-org
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The categories of this paper are: stat
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The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
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The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
2
The categories of this paper are: math