Resonating Valence Bond Wave Functions for Strongly Frustrated Spin Systems
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 J1-J2 Heisenberg model for 0.4 J2/J1 0.5. This wave function is proposed to represent the generic spin-half RVB ground state in spin liquids.
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