Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Temperature Dependence of Critical Current Fluctuations in
  Nb/AlO$\mathrm{_{x}}$/Nb Josephson Junctions   We have measured the low frequency critical current noise in
Nb/AlO$_{\mathrm{x}}$/Nb Josephson junctions. Unshunted junctions biased above
the gap voltage and resistively shunted junctions biased near the critical
current, $I_{c}$, have been measured. For both, the spectral density of $\delta
I_{c}/I_{c}$, $S_{i_{c}}(f)$, is proportional to $1/f$, scales inversely as the
area, $A$, and is independent of $J_{c} \equiv I_{c}/A$ over a factor of nearly
20 in $J_{c}$. For all devices measured at 4.2 K, $S_{i_{c}}$(1 Hz)$= 2.0 \pm
0.4 \cdot 10^{-12}$/Hz when scaled to A=1 $\mu$m$^{2}$. We find that, from 4.2
K to 0.46 K, $S_{i_{c}}(f)$ decreases linearly with temperature.

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The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
2
The categories of this paper are: math
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The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol