Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum tomography for Dirac spinors   We present a tomographic scheme, based on spacetime symmetries, for the
reconstruction of the internal degrees of freedom of a Dirac spinor. We discuss
the circumstances under which the tomographic group can be taken as SU(2), and
how this crucially depends on the choice of the gamma matrix representation. A
tomographic reconstruction process based on discrete rotations is considered,
as well as a continuous alternative.

30
The categories of this paper are: q-alg
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th