Figure 2
From: Protecting quantum correlations of the XXZ model by topological boundary conditions
Concurrence 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 values of concurrence are 0.85, 0.85 and 0.32 for the topological case (a–c)] and 0.61, 0.61 and 0.28 for the periodical case (a′–c′).
