Symmetry-projected wave function methods capture static correlation by breaking and restoring the symmetries of a system. In this article, we present the symmetry-projected spin antisymmetrized geminal power (spin-AGP) state projected onto space group symmetry as well as complex conjugation, spin-flip, and time-reversal symmetries. The method is benchmarked on the 1D XXZ model and 2D J1−J2 model with square and triangular lattices. Our results indicate that symmetry projection methods provide a powerful tool for frustrated spin systems.
@article{arxiv.2504.08130,
title = {Symmetry-Projected Spin-AGP Methods Applied to Spin Systems},
author = {Zhiyuan Liu and Thomas M. Henderson and Gustavo E. Scuseria},
journal= {arXiv preprint arXiv:2504.08130},
year = {2025}
}