For unitary Cayley graphs of order 2p with p odd prime, minimum quantum fractional revival time is 2π/p with amplitudes cos(2π/p) and -i sin(2π/p); entanglement entropy depends only on the absolute values of these amplitudes.
Fractional revival on semi-Cayley graphs over abelian groups,
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Quantum Fractional Revival and Entanglement Entropy in Unitary Cayley Graphs
For unitary Cayley graphs of order 2p with p odd prime, minimum quantum fractional revival time is 2π/p with amplitudes cos(2π/p) and -i sin(2π/p); entanglement entropy depends only on the absolute values of these amplitudes.