Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamics and Energy Distribution of Non-Equilibrium Quasiparticles in
  Superconducting Tunnel Junctions   We present a full theoretical and experimental study of the dynamics and
energy distribution of non-equilibrium quasiparticles in superconducting tunnel
junctions (STJs). STJs are often used for single-photon spectrometers, where
the numbers of quasiparticles excited by a photon provide a measure of the
photon energy. The magnitude and fluctuations of the signal current in STJ
detectors are in large part determined by the quasiparticle dynamics and energy
distribution during the detection process. We use this as motivation to study
the transport and energy distribution of non-equilibrium quasiparticles excited
by x-ray photons in a lateral, imaging junction configuration. We present a
full numerical model for the tunneling current of the major physical processes
which determine the signal. We find that a diffusion framework models the
quasiparticle dynamics well and that excited quasiparticles do not equilibrate
to the lattice temperature during the timescales for tunneling. We extract
physical timescales from the measured data, make comparisons with existing
theories, and comment on implications for superconducting mesoscopic systems
and single-photon detectors.

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The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
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The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat