Two-spin subsystem entanglement in spin 1/2 rings with long range interactions

M. Gaudiano, O. Osenda, G. A. Raggio

We consider the two-spin subsystem entanglement for eigenstates of the Hamiltonian \[ H= \sum_{1\leq j< k \leq N} (\frac{1}{r_{j,k}})^α {\mathbf σ}_j\cdot {\mathbf σ}_k \] for a ri…