Exact Fractional Revival in Spin Chains

TL;DR

This paper explores the phenomenon of fractional revival in quantum spin chains, providing exact models and explaining how to obtain such chains through isospectral deformations of those with perfect state transfer.

Contribution

It introduces analytic models demonstrating fractional revival in spin chains and shows how to generate these chains via isospectral deformations of perfect state transfer chains.

Findings

Exact solutions for fractional revival in spin chains

Method to obtain fractional revival chains from perfect state transfer chains

Analytic models demonstrating fractional revival phenomena

Abstract

The occurrence of fractional revival in quantum spin chains is examined. Analytic models where this phenomenon can be exhibited in exact solutions are provided. It is explained that spin chains with fractional revival can be obtained by isospectral deformations of spin chains with perfect state transfer.