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Symmetry-projected spin-AGP methods applied to spin systems
Zhiyuan Liu1, Thomas M Henderson1,2, Gustavo E Scuseria1,2
1Department of Physics and Astronomy, Rice University, Houston, Texas 77005-1892, USA.
None:
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 the 2D J1 - J2 model with square and triangular lattices. Our results indicate that symmetry projection methods provide a powerful tool for frustrated spin systems.
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