Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The swap operation in the two-qubit Heisenberg XXZ model-effects of
  anisotropy and magnetic field   In this paper we study the swap operation in a two-qubit anisotropic XXZ
model in the presence of an inhomogeneous magnetic field. We establish the
range of anisotropic parameter within which the swap operation is feasible. The
swap errors caused by the inhomogeneous field are evaluated.

18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph