Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An introduction to the spectrum, symmetries, and dynamics of spin-1/2
  Heisenberg chains   Quantum spin chains are prototype quantum many-body systems. They are
employed in the description of various complex physical phenomena. The goal of
this paper is to provide an introduction to the subject by focusing on the time
evolution of a Heisenberg spin-1/2 chain and interpreting the results based on
the analysis of the eigenvalues, eigenstates, and symmetries of the system. We
make available online all computer codes used to obtain our data.

30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ