Himadri Shekhar Dhar, Aditi Sen De, Ujjwal Sen
We consider a class of large superposed states, obtained from dimer coverings on spin-1/2 isotropic lattices. We show that they are genuinely multiparty entangled, irrespective of the geometry and dimension of the isotropic lattice. We then present an efficient method to characterize the genuine multisite entanglement in the case of isotropic square spin-1/2 lattices, with short-range dimer coverings. We use this iterative analytical method to calculate the multisite entanglement of finite-sized lattices, which, through finite-size scaling, enables us to obtain the estimate of the multisite entanglement of the infinite square lattice. The method can be a useful tool to investigate other single- and multisite properties of such states.
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http://arxiv.org/abs/1211.3877
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