Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Josephson oscillation linewidth of ion-irradiated YBa$_2$Cu$_3$O$_7$
  junctions   We report on the noise properties of ion-irradiated YBa$_2$Cu$_3$O$_7$
Josephson junctions. This work aims at investigating the linewidth of the
Josephson oscillation with a detector response experiment at $\simeq$132 GHz.
Experimental results are compared with a simple analytical model based on the
Likharev-Semenov equation and the de Gennes dirty limit approximation. We show
that the main source of low-frequency fluctuations in these junctions is the
broadband Johnson noise and that the excess ($\frac{1}{f}$) noise contribution
does not prevail in the temperature range of interest, as reported in some
other types of high-T$_c$ superconducting Josephson junctions. Finally, we
discuss the interest of ion-irradiated junctions to implement frequency-tunable
oscillators consisting of synchronized arrays of Josephson junctions.

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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: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
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The categories of this paper are: nlin
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
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The categories of this paper are: eess
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph