Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analytic "Newton's cradles" with perfect transfer and fractional revival   Analytic mass-spring chains with dispersionless pulse transfer and fractional
revival are presented. These are obtained using the properties of the
para-Racah polynomials. This provides classical analogs of the quantum spin
chains that realize important tasks in quantum information: perfect state
transfer and entanglement generation.

36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph