Figure 7
From: Protecting quantum correlations of the XXZ model by topological boundary conditions
Negativity versus B and b in the topological XXZ model and the periodical XXZ model with T = 1, J = 1 and Jz = 1.5. The maximum value of negativity is 0.27 for the topological case (a) and 0.25 for the periodical case (b).
