Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin-photovoltaic effect in quantum wires due to inter-subband
  transitions   We consider the current induced in a quantum wire by external electromagnetic
radiation. The photocurrent is caused by the interplay of spin-orbit
interaction (Rashba and Dresselhaus terms) and external in-plane magnetic
field. We calculate this current using a Wigner functions approach taking into
account radiation-induced transitions between transverse subbands. The
magnitude and the direction of the current depend on the Dresselhaus and Rashba
constants, strength of magnetic field, radiation frequency and intensity. The
current can be controlled by changing some of these parameters.

23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci