Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-linear response and electron-electron interactions in mesoscopic
  metal rings   A time-dependent electric field gives rise to a stationary non-equilibrium
current I^{(2)} around a mesoscopic metal ring threaded by a magnetic flux. We
show that this current, which is proportional to the intensity of the field, is
closely related to the exchange part of the interaction contribution to the
equilibrium persistent current, and that the corresponding non-linear
conductivity directly measures the weak localization correction to the
polarization. We explicitly calculate the disorder average of I^{(2)} in the
diffusive regime as function of the frequency of the electric field and the
static flux piercing the ring, and suggest an experiment to test our theory.

3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
19
The categories of this paper are: eess