Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Current fluctuations of noncollinear single-electron spin-valve
  transistors   We theoretically investigate the finite-frequency as well as the
zero-frequency charge-current fluctuations through a noncollinear
single-electron spin-valve transistor in the limit of sequential tunneling. The
system under consideration consists of two tunnel junctions that connect a
small central metallic island to two ferromagnetic leads with noncollinear
magnetization. Due to the spin-dependent tunnel coupling and the
electron-electron interaction on the central electrode an exchange field that
acts on the accumulated island spin is present. We analyze how this
many-particle interaction effect influences the current noise. In detail, we
present that the field leads to a reduction of the sub-Poissonian Fano factor.

29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn