Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin-dependent quantum transport in periodic magnetic modulations:
  Aharonov-Bohm ring structure as a spin filter   Quantum interference in Aharonov-Bohm (AB) ring structure provides additional
control of spin at mesoscopic scale. We propose a scheme for spin filter by
studying the coherent transport through the AB structure with lateral magnetic
modulation on both arms of the ring structure. Large spin polarized current can
be obtained with many energy channels.

24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat