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Analytic Relations between Localizable Entanglement and String Correlations in Spin Systems
Physical Review Letters
We study the relation between the recently defined localizable entanglement and generalized correlations in quantum spin systems. Differently from the current belief, the localizable entanglement is always given by the average of a generalized string. Using symmetry arguments we show that in most spin 1/2 and spin 1 systems the localizable entanglement reduces to the spin-spin or string correlations, respectively. We prove that a general class of spin 1 systems, which includes the Heisenbergdoi:10.1103/physrevlett.94.207207 pmid:16090283 fatcat:2n7ya7duo5gl7epfcii232djlu