In this paper we reexamine the problem of the separation of spin and charge degrees of freedom in two dimensional strongly correlated systems. We establish a set of sufficient conditions for the occurence of spin and charge separation. Specifically, we discuss this issue in the context of the Heisenberg model for spin-1/2 on a square lattice with nearest (J1) and next-nearest (J2) neighbor anti...

Recent numerical simulations find a possible chiral spin-liquid state in the intermediate coupling regime of triangular lattice Hubbard model. Here we provide simple picture for its origin terms bosonic resonating valence bond (RVB) description. More specifically, show that such can be understood as quantum disordered tetrahedral spin stabilized by four ring exchange coupling, which suppresses ...

Fast convergence speed is a desired property for training latent Dirichlet allocation (LDA), especially in online and parallel topic modeling for massive data sets. This paper presents a novel residual belief propagation (RBP) algorithm to accelerate the convergence speed for training LDA. The proposed RBP uses an informed scheduling scheme for asynchronous message passing, which passes fast-co...