Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlinear Transport and Current Fluctuation in an AB Ring with a Quantum
  Dot   Nonequilibrium steady states are explicitly constructed for a noninteracting
electron model of an Aharonov-Bohm (AB) ring with a quantum dot (QD) with the
aid of asymptotic fields. The Fano line shapes and AB oscillations are shown to
strongly depend on the bias voltage. Current fluctuations are studied as well.

22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex