Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasi-one-dimensional flow of polariton condensate past an obstacle   Nonlinear wave patterns generated by the flow of polariton condensate past an
obstacle are studied for quasi-one-dimensional microcavity geometry. It is
shown that pumping and nonlinear damping play a crucial role in this process
leading to sharp differences in subsonic and supersonic regimes. Subsonic flows
result in a smooth disturbance of the equilibrium condensate around the
obstacle whereas supersonic flow generates a dispersive shock wave in the flow
upstream the obstacle and a long smooth downstream tail. Main characteristics
of the wave pattern are calculated analytically and analytical results are in
excellent agreement with the results of numerical simulations. The conditions
for existence of stationary wave patterns are determined numerically.

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The categories of this paper are: q-fin
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The categories of this paper are: stat
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: q-bio
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
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The categories of this paper are: supr-con
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph
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The categories of this paper are: cmp-lg