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About this paper
Mahmud Ashraf Shamim, Md Moshiur Rahman Raj, Mohamed Hibat-Allah, Ruy Fabila-Monroy, Nobuchika Okada, Paulo T. Araujo
The authors cast sign reconstruction in frustrated Heisenberg antiferromagnets as weighted Max-Cut on a graph of spin configurations linked by allowed exchanges. Fixed amplitudes set edge weights. For a 4×4 square lattice at J₂/J₁=0.5, two methods report 1.000 sign-match accuracy against exact signs. The guarantee requires exact amplitudes and a nondegenerate real ground state; the graph may be exponentially large.
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