Resonating Valence Bond Wave Functions for Strongly Frustrated Spin Systems
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The resonating-valence-bond theory for two-dimensional quantum antiferromagnets is shown to be the correct paradigm for large enough "quantum frustration" and a new type of variational wave function is proposed to represent the generic spin-half RVB ground state in spin liquids.Abstract:
The resonating-valence-bond (RVB) theory for two-dimensional quantum antiferromagnets is shown to be the correct paradigm for large enough ``quantum frustration.'' This scenario, proposed a long time ago but never confirmed by microscopic calculations, is strongly supported by a new type of variational wave function, which is extremely close to the exact ground state of the ${J}_{1}{\ensuremath{-}J}_{2}$ Heisenberg model for $0.4\ensuremath{\lesssim}{J}_{2}{/J}_{1}\ensuremath{\lesssim}0.5$. This wave function is proposed to represent the generic spin-half RVB ground state in spin liquids.read more
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