Fig. 1: Phase diagram of the spin-1 bilinear-biquadratic (BLBQ) chain.
From: Efficiency of neural quantum states in light of the quantum geometric tensor
We perform infidelity (Eq. (2)) minimization, with a neural quantum state (NQS) ansatz given by a modified restricted Boltzmann machine (RBM) for spin-1 models15 (described in Methods section), at the four marked points in the phase diagram: antiferromagnetic-Heisenberg (AFH), Affleck-Kennedy-Lieb-Tasaki (AKLT), and the two critical phases at θ = π/4, and \(\arctan (2)\) respectively.
