Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Alice and Bob in an anisotropic expanding spacetime   We investigate a quantum teleportation process between two comoving observers
Alice and Bob in an anisotropic expanding spacetime. In this model, we
calculate the fidelity of teleportation and we noted an oscillation of its
spectrum as a function of the azimuthal angle. We found that for the polar
angle $\phi = \frac{\pi}{2}$ and the azimuthal angle $\theta \neq
\frac{3\pi}{4} + n\pi$ with $n = 0, 1, 2, ...$ the efficiency of the process
decreases, i.e., the fidelity is less than one. In addition, it is shown that
the anisotropic effects on the fidelity becomes more significative in the
regime of smooth expansion and the limit of massless particles. On the other
hand, the influence of curvature coupling becomes noticeable in the regime of
fast expansion (values of $\frac{\rho}{\omega} \gg 1$).

31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
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The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
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The categories of this paper are: stat
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: plasm-ph