Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Finite temperature fermionic charge and current densities induced by a
  cosmic string with magnetic flux   We investigate the finite temperature expectation values of the charge and
current densities for a massive fermionic field with nonzero chemical
potential, $\mu$, in the geometry of a straight cosmic string with a magnetic
flux running along its axis. These densities are decomposed into the vacuum
expectation values and contributions coming from the particles and
antiparticles. The charge density is an even periodic function of the magnetic
flux with the period equal to the quantum flux and an odd function of the
chemical potential. The only nonzero component of the current density
corresponds to the azimuthal current. The latter is an odd periodic function of
the magnetic flux and an even function of the chemical potential. At high
temperatures, the parts in the charge density and azimuthal current induced by
the planar angle deficit and magnetic flux are exponentially small. The
asymptotic behavior at low temperatures crucially depends whether the value
$|\mu|$ is larger or smaller than the mass of the field quanta, $m$. For
$|\mu|<m$ the charge density and the contributions into the azimuthal current
coming from the particles and antiparticles are exponentially suppressed at low
temperatures. In the case $|\mu|>m$, the charge and current densities receive
two contributions coming from the vacuum expectation values and from particles
or antiparticles (depending on the sign of chemical potential). At large
distances from the string the latter exhibits a damping oscillatory behavior
with the amplitude inversely proportional to the square of the distance.

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The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: math-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
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The categories of this paper are: q-bio