Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Viscous electron flow in mesoscopic two-dimensional electron gas   We report electrical and magneto transport measurements in mesoscopic size,
two-dimensional (2D) electron gas in a GaAs quantum well. Remarkably, we find
that the probe configuration and sample geometry strongly affects the
temperature evolution of local resistance. We attribute all transport
properties to the presence of hydrodynamic effects. Experimental results
confirm the theoretically predicted significance of viscous flow in mesoscopic
devices.

19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con