Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic Field Driven Quantum Phase Transitions in Josephson Arrays   We have studied the magnetic-field-driven quantum phase transitions in
Josephson junction arrays with a large coordination number. The characteristic
energies were extracted in both the superconducting and insulating phases by
integrating the current-voltage characteristics over a voltage range 2eV\leqk_B
T. For the arrays with a relatively strong Josephson coupling, we observed
duality between the energies in the superconducting and insulating phases. The
arrays with a weaker Josephson coupling demonstrate an intermediate, "bad
metal" regime in weak magnetic fields; this observation underlines the
importance of vortex pinning at large scales and, presumably, emergent
inhomogeneity in the presence of strong offset charge disorder.

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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci
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The categories of this paper are: bayes-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: stat
13
The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: gr-qc
3
The categories of this paper are: physics
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The categories of this paper are: funct-an
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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-th