Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possible resonance effect of axionic dark matter in Josephson junctions   We provide theoretical arguments that dark matter axions from the galactic
halo that pass through the earth may generate a small observable signal in
resonant S/N/S Josephson junctions. The corresponding interaction process is
based on uniqueness of the gauge-invariant axion Josephson phase angle modulo 2
pi and is predicted to produce a small Shapiro step-like feature without
externally applied microwave radiation when the Josephson frequency resonates
with the axion mass. A resonance signal of so far unknown origin observed in
[C. Hoffmann et al. PRB 70, 180503(R) (2004)] is consistent with our theory and
can be interpreted in terms of an axion mass of 0.11 meV and a local galactic
axionic dark matter density of 0.05 GeV/cm^3. We discuss future experimental
checks to confirm the dark-matter nature of the observed signal.

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The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg
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The categories of this paper are: physics
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The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
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The categories of this paper are: math-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an