Density matrix elements and entanglement entropy for the spin-1/2 XXZ chain at Δ = 1/2

Sato, Jun ; Shiroishi, Masahiro

Journal of physics. A, Mathematical and theoretical, 2007-07, Vol.40 (30), p.8739-8749, Article 8739 [Periódico revisado por pares]

Bristol: IOP Publishing

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