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Entanglement, fractional magnetization and long-range interactions

Andrea Cadarso, Mikel Sanz, Michael M. Wolf, J. Ignacio Cirac, David Perez-Garcia

Phys. Rev. B 87, 035114 , (2013) 1209.3898 Pfeil

Abstract: Based on the theory of Matrix Product States, we give precise statements and complete analytical proofs of the following claim: a large fractionalization in the magnetization or the need of long-range interactions imply large entanglement in the state of a quantum spin chain.