Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Controllable structuring of exciton-polariton condensates in cylindrical
  pillar microcavities   We observe condensation of exciton polaritons in quantum states composed of
concentric rings when exciting cylindrical pillar GaAs/AlGaAs microcavities
non-resonantly by a focused laser beam normally incident at the center of the
pillar. The number of rings depends on the pumping intensity and the pillar
size, and may achieve 5 in the pillar of 40 mkm diameter. Breaking the axial
symmetry when moving the excitation spot away from the pillar center leads to
transformation of the rings into a number of bright lobes corresponding to
quantum states with nonzero angular momenta. The number of lobes, their shape
and location are dependent on the spot position. We describe the
out-of-equilibrium condensation of polaritons in the states with different
principal quantum numbers and angular momenta with a formalism based on
Boltzmann-Gross-Pitaevskii equations accounting for repulsion of polaritons
from the exciton reservoir formed at the excitation spot and their spatial
confinement by the pillar boundary.

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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
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The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: math-ph
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The categories of this paper are: supr-con
2
The categories of this paper are: math
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The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph