Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Vortex interactions in the collision of Bose-Einstein condensates   We investigate the effects of vortex interaction on the formation of
interference patterns in a coherent pair of two-dimensional Bose condensed
clouds of ultra-cold atoms traveling in opposite directions subject to a
harmonic trapping potential. We identify linear and nonlinear regimes in the
dipole oscillations of the condensates according to the balance of internal and
centre-of-mass energies of the clouds. Simulations of the collision of two
clouds each containing a vortex with different winding number (charge) were
carried out in these regimes in order to investigate the creation of varying
interference patterns. The interaction between different vortex type can be
clearly distinguished by those patterns.

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The categories of this paper are: hep-lat
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The categories of this paper are: eess
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The categories of this paper are: supr-con
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The categories of this paper are: quant-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
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The categories of this paper are: cmp-lg
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-th
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg