Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Moving flux quanta cool superconductors by a microwave breath   Almost any use of a superconductor implies a nonequilibrium state.
Remarkably, the non-equilibrium states induced by a microwave stimulus and the
dynamics of magnetic flux quanta (Abrikosov vortices) can give rise to
strikingly contrary effects: A sufficiently high-power electromagnetic field of
GHz frequency can stimulate superconductivity, whereas fast vortex motion can
trigger an instability abruptly quenching the superconducting state. Here, we
advance or delay such dynamical quenching of the vortex state in Nb thin films
by tuning the power and frequency of the microwave ac stimulus added to a dc
bias current. The experimental findings are supported by time-dependent
Ginzburg-Landau simulations and they can be explained qualitatively based on a
model of "breathing mobile hot spots", implying a competition of heating and
cooling of quasiparticles along the trajectories of moving fluxons whose core
sizes vary in time. In addition, we demonstrate universality of the stimulation
effect on the thermodynamic and transport properties of type II
superconductors.

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The categories of this paper are: cs
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The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
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The categories of this paper are: physics
28
The categories of this paper are: alg-geom
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The categories of this paper are: econ
32
The categories of this paper are: atom-ph
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The categories of this paper are: stat
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The categories of this paper are: adap-org
10
The categories of this paper are: q-bio