Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativistic entanglement of two particles driven by continuous product
  momenta   In this paper we explore the entanglement of two relativistic spin-$1/2$
particles with continuous momenta. The spin state is described by the Bell
state and the momenta are given by Gaussian distributions of product form.
Transformations of the spins are systematically investigated in different boost
scenarios by calculating the orbits and concurrence of the spin degree of
freedom. By visualizing the behavior of the spin state we get further insight
into how and why the entanglement changes in different boost situations.

17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
23
The categories of this paper are: solv-int