title: 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 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)-J(2) Heisenberg model for 0.4 less than approximately J(2)/J(1) less than approximately 0.5. This wave function is proposed to represent the generic spin-half RVB ground state in spin liquids.
authors.affiliation: Istituto Nazionale per la Fisica della Materia, Unità di Firenze, I-50125 Firenze, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Capriotti
authors.forename: F
authors.initials: F
authors.lastname: Becca
authors.forename: A
authors.initials: A
authors.lastname: Parola
authors.forename: S
authors.initials: S
authors.lastname: Sorella