Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Teleportation in a System of Identical Particles   The teleportation of an unknown polarization state of one of the photons in a
system of identical particles has been considered. It has been shown that
spatial degrees of freedom, which are various directions of the momentum of
three photons, are of significant importance for teleportation in the system of
identical particles. The inclusion of the spatial degrees of freedom increases
the dimension of single-particle state space. In view of this increase, a
four-dimensional subspace of two-particle states, which is similar to the state
space spanned by the Bell states in a system of two distinguishable qubits, can
be separated in the experimental configuration.

17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
2
The categories of this paper are: math
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph