Extrapolated ground-state energy density reaches -0.669441857(7) and sublattice magnetization 0.307447(2) for the 2D S=1/2 Heisenberg antiferromagnet, with finite-size corrections matching chiral perturbation theory.
The trend of increas- ingly good variational states based on TNs and NNs will only continue and better benchmarks are called for
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High-precision ground state parameters of the two-dimensional spin-1/2 Heisenberg model on the square lattice
Extrapolated ground-state energy density reaches -0.669441857(7) and sublattice magnetization 0.307447(2) for the 2D S=1/2 Heisenberg antiferromagnet, with finite-size corrections matching chiral perturbation theory.