Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Entanglement of higher-derivative oscillators in holographic systems   We study the quantum entanglement of coupled Pais-Uhlenbeck oscillators using
the formalism of thermo-field dynamics. The entanglement entropy is computed
for the specific cases of two and a ring of $N$ coupled Pais-Uhlenbeck
oscillators of fourth order. It is shown that the entanglement entropy depends
on the temperatures, frequencies and coupling parameters of the different
degrees of freedom corresponding to harmonic oscillators. We also make remarks
on the appearance of instabilities of higher-derivative oscillators in the
context of AdS/CFT correspondence. Finally, we advert to the information
geometry theory by calculating the Fisher information metric for the considered
system of coupled oscillators.

10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph