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Quantum spin chains with fractional revival. (English) Zbl 1380.82030
Summary: A systematic study of fractional revival at two sites in \(X X\) quantum spin chains is presented. Analytic models with this phenomenon are obtained by combining two basic ways of realizing fractional revival in a spin chain. The first proceeds through isospectral deformations of spin chains with perfect state transfer. The second makes use of couplings provided by the recurrence coefficients of polynomials with a bi-lattice orthogonality grid. The latter method leads to analytic models previously identified that can exhibit perfect state transfer in addition to fractional revival.

82C20 Dynamic lattice systems (kinetic Ising, etc.) and systems on graphs in time-dependent statistical mechanics
81P45 Quantum information, communication, networks (quantum-theoretic aspects)
Full Text: DOI
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