Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theory of coherent quantum phase-slips in Josephson junction chains with
  periodic spatial modulations   We study coherent quantum phase-slips which lift the ground state degeneracy
in a Josephson junction ring, pierced by a magnetic flux of the magnitude equal
to half of a flux quantum. The quantum phase-slip amplitude is sensitive to the
normal mode structure of superconducting phase oscillations in the ring
(Mooij-Sch\"on modes). These, in turn, are affected by spatial inhomogeneities
in the ring. We analyze the case of weak periodic modulations of the system
parameters and calculate the corresponding modification of the quantum
phase-slip amplitude.

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The categories of this paper are: dg-ga
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The categories of this paper are: mtrl-th
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The categories of this paper are: econ
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The categories of this paper are: quant-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: math-ph
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
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The categories of this paper are: q-bio
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The categories of this paper are: nlin