Sun, Zhe; Wang, Xiaoguang; Xiong, Heng-Na - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 7, pp. 1337-1343
We study entanglement, purity and fidelity in the anisotropy (1/2,1) mixed-spin Heisenberg chain. We find that negativity, as a measure of entanglement, displays a dip at the SU(2) isotropic point of the system, which is in contrast to the peak appearance of concurrence in the spin-1/2 XXZ...