Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Increasing singlet fraction with entanglement swapping   We consider entanglement swapping for certain mixed states. We assume that
the initial states have the same singlet fraction and show that the final state
can have singlet fraction greater than the initial states. We also consider two
quantum teleportations and show that entanglement swapping can increase
teleportation fidelity. Finally, we show how this effect can be demonstrated
with linear optics.

19
The categories of this paper are: eess
18
The categories of this paper are: econ
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org