Fig. 2: Logarithmic negativity for adjacent sites.
From: Entanglement microscopy and tomography in many-body systems
Color code plots of (a) \({{{{\mathcal{E}}}}}^{b}\) in 2d TFIM simulated in a 40 × 40 square lattice with β up to 40, and (b) \({{{{\mathcal{E}}}}}^{f}\) in 2d fermion t − V model simulated in a 6 × 6 square lattice with β up to 15. In both panels, the red curves represent the finite-temperature phase boundaries, which end at a zero temperature QCP located at hc = 3.044 in 2d TFIM42 and Vc = 1.27 in t − V model. The purple dashed lines show the maxima of \({{{{\mathcal{E}}}}}^{b/f}\) for each temperature. In both models, the maxima have converged with system size, as is shown in the SM. The bottom panel illustrates the schematic phase diagrams.
