A theoretical review is given on high temperature superconductivity in copper oxides
(cuprates) by focusing on the hole doping cases based on the view that it is realized in …

We review the resonating valence bond (RVB) theory of high-temperature superconductivity
using Gutzwiller projected wave functions that incorporate strong correlations. After a …

We present a general review of the projective symmetry group classification of fermionic
quantum spin liquids for lattice models of spin S= 1/2. We then introduce a systematic …

Inelastic neutron scattering is used to study the low-energy magnetic excitations in the spin-
1 triangular lattice of the 6 HB phase of Ba 3 NiSb 2 O 9. We study two powder samples: Ba …

Motivated by recent experiments on Ba 3 NiSb 2 O 9, we investigate possible quantum spin
liquid ground states for spin S= 1 Heisenberg models on the triangular lattice. We use …

In this paper, we review the low energy electronic structure of the kinetic energy driven d-
wave cuprate superconductors. We give a general description of the charge-spin separation …

We present a systematic study of the phase diagram of the tt′-J model by using the Green's
function Monte Carlo (GFMC) technique, implemented within the fixed-node (FN) …

We propose a systematic approach to the systems of correlated electrons, the so-called-DE-
GWF method, based on reciprocal-space (-resolved) diagrammatic expansion of the …

We present an exact ground state solution of a quantum dimer model introduced by Punk,
Allais, and Sachdev [Quantum dimer model for the pseudogap metal, Proc. Natl. Acad. Sci …

The Gutzwiller approximation (GA) for Gutzwiller-projected grand canonical wave functions
with fugacity factors is investigated in detail. Our systems in general contain inhomogeneity …