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Resonating Valence Bond Wave Functions for Strongly Frustrated Spin Systems

Luca Capriotti·Federico Becca·Alberto Parola·Sandro Sorella
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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 long time ago but never confirmed by microscopic calculations, is very strongly supported by a new type of variational wave function, which is extremely close to the exact ground state of the $J_1{-}J_2$ Heisenberg model for $0.4 \lesssim J_2/J_1\lesssim 0.5$. This wave function is proposed to represent the generic spin-half RVB ground state in spin liquids.

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Luca Capriotti, Federico Becca, Alberto Parola, Sandro Sorella. 2001-07-10. Resonating Valence Bond Wave Functions for Strongly Frustrated Spin Systems. https://doi.org/10.1103/physrevlett.87.097201

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