Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Co-tunneling current through the two-level quantum dot coupled to
  magnetic leads: A role of exchange interaction   The co-tunneling current through a two-level doubly occupied quantum dot
weakly coupled to ferromagnetic leads is calculated in the Coulomb blockade
regime. It is shown that the dependence of the differrential conductance on
applied voltage has a stair-case structure with different sets of "stairs" for
parallel and anti-parallel configurations of magnetization of the leads.
Contributions to the current from elastic and inelastic processes are
considered distinctly. It is observed that the interference part of the
co-tunneling current involves terms corresponding to inelastic processes.
Dependence of the co-tunneling current on the phases of the tunneling
amplitudes is studied.

26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th