Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Semiclassical pair production rate for rotating electric fields   We semiclassically investigate Schwinger pair production for pulsed rotating
electric fields depending on time. To do so we solve the Dirac equation for
two-component fields in a WKB-like approximation. The result shows that for
two-component fields the spin distribution of produced pairs is generally not
$1:1$. As a result the pair creation rates of spinor and scalar quantum electro
dynamics (QED) are different even for one pair of turning points. For rotating
electric fields the pair creation rate is dominated by particles with a
specific spin depending on the sense of rotation for a certain range of pulse
lengths and frequencies. We present an analytical solution for the momentum
spectrum of the constant rotating field. We find interference effects not only
in the momentum spectrum but also in the total particle number of rotating
electric fields.

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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: stat
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: math
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The categories of this paper are: math-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: q-fin
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The categories of this paper are: hep-ex