Fig. 4: Phase diagram of the 15 × 15 finite system and finite lattice orders.
From: Entanglement in the quantum phases of an unfrustrated Rydberg atom array
a The phase diagram, where colors correspond to the same phase classifications as Fig. 2. Triangles represent tentative classification of points showing inconsistent PEPS convergence, see Supplementary Methods. A new order, which we call square, is specified in (c) and various examples of boundary-bulk frustrated ground states in (b). d The density profile for a nematic-like ground state that can be stabilized on a 15 × 14 lattice at (δ, Rb) = (3.4, 2.1) with manually tailored edge excitations (see text). e Comparing the correlations of the finite nematic phase to the converged bulk phase. The degeneracy of the peaks is split by the boundary excitations, but the number of peaks is generally conserved between the two (green ovals), which provides a clear distinction from mean-field states (see Fig. 3b).
