Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Current crowding in nanoscale superconductors within the Ginzburg-Landau
  model   The current density in a superconductor with turnarounds or constrictions is
non-uniform due to a geometrical current crowding effect. This effect reduces
the critical current in the superconducting structure compared to a straight
segment and is of importance when designing superconducting devices. We
investigate the current crowding effect in numerical simulations within the
generalized time-dependent Ginzburg-Landau (GTDGL) model. The results are
validated experimentally by measuring the magnetic field dependence of the
critical current in superconducting nanowire structures, similar to those
employed in single-photon detector devices. Comparing the results with London
theory, we conclude that the reduction in critical current is significantly
smaller in the GTDGL model. This difference is attributed to the current
redistribution effect, which reduces the current density in weak points of the
superconductor and counteracts the current crowding effect. We numerically
investigate the effect of fill factor on the critical current in a meander and
conclude that the reduction of critical current is low enough to justify fill
factors higher than $33\,\%$ for applications where detection efficiency is
critical. Finally, we propose a novel meander design which can combine high
fill factor and low current crowding.

8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga