Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum theory of curvature and synchro-curvature radiation in a strong
  and curved magnetic field, and applications to neutron star magnetospheres   In a previous paper, we derived the quantum states of a Dirac particle in a
circular, intense magnetic field in the limit of low momentum perpendicular to
the field with the purpose of giving a quantum description of the trajectory of
an electron, or a positron, in a typical pulsar or magnetar magnetosphere. Here
we continue this work by computing the radiation resulting from transitions
between these states. This leads to derive from first principles a quantum
theory of the so-called curvature and synchro-curvature radiations relevant for
rotating neutron-star magnetospheres. We find that, within the approximation of
an infinitely confined wave-function around the magnetic field and in the
continuous energy-level limit, classical curvature radiation can be recovered
in a fully consistent way. Further we introduce discrete transitions to account
for the change of momentum perpendicular to the field and derive expressions
for what we call quantum synchro-curvature radiation. Additionally, we express
deconfinement and quantum recoil corrections.

5
The categories of this paper are: gr-qc
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The categories of this paper are: cond-mat
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The categories of this paper are: eess
13
The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: physics
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: plasm-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol