Long-distance entanglement, violation of cluster decomposition and anomalous dynamics in local quantum spin models.
II - Fisica della materia
GSSI Ex ISEF - Aula C - Mercoledì 25 h 10:00 - 13:00
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We compute exactly the correlation functions and some peculiar entanglement properties for two classes of local integer and half-integer spin chains whose non-degenerate ground states can be expressed in terms of uniform superpositions of Motzkin and Dyck paths. Surprisingly we find a violation of the cluster decomposition property for the correlation functions, a large deviation from the area law for the entanglement entropy and an extremely fast propagation of the excitations after a quantum quench.