Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Universal Voltage Fluctuations in Disordered Superconductors   The Aharonov-Casher effect is the analogue of the Aharonov-Bohm effect that
applies to neutral particles carrying a magnetic moment.
  This can be manifested by vortices or fluxons flowing in trajectories that
encompass an electric charge. These have been predicted to result in a
persistent voltage which fluctuates for different sample realizations. Here we
show that disordered superconductors exhibit reproducible voltage fluctuation,
antisymmetrical with respect to magnetic field, as a function of various
parameters such as magnetic field amplitude, field orientations and gate
voltage. These results are interpreted as the vortex equivalent of the
universal conductance fluctuations typical of mesoscopic disordered metallic
systems. We analyze the data in the framework of random matrix theory and show
that the fluctuation correlation functions and curvature distributions exhibit
behavior which is the fingerprint of Aronov-Casher physics. The results
demonstrate the quantum nature of the vortices in highly disordered
superconductors both above and below $T_c$.

31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
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The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: nlin
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom