533 citations · 1.9k across the 41 of their papers we have counts for
9 papers · 2 filters
Crossover effects in the random exchange spin-1/2 antiferromagnetic chain
Nicolas laflorencie, Heiko Rieger, Anders W. Sandvik +1
The random antiferromagnetic spin-1/2 XX and XXZ chain is studied numerically for varying strength of the disorder, using exact diagonalization and stochastic series expansion meth…
Deconfinement and criticality in extended two-dimensional dimer models
Anders W. Sandvik
A square-lattice hard-core dimer model with links extending beyond nearest-neighbors is studied using a directed-loop Monte Carlo method. An arbitrarily small fraction of next-near…
Two-Dimensional Quantum XY Model with Ring Exchange and External Field
R. G. Melko, A. W. Sandvik, D. J. Scalapino
We present the zero-temperature phase diagram of a square lattice quantum spin 1/2 XY model with four-site ring exchange in a uniform external magnetic field. Using quantum Monte C…
Magnetic ordering in a doped frustrated spin-Peierls system
Nicolas Laflorencie, Didier Poilblanc, Anders W. Sandvik
Based on a model of a quasi-one dimensional spin-Peierls system doped with non-magnetic impurities, an effective two-dimensional Hamiltonian of randomly distributed S=1/2 spins int…
The directed-loop algorithm
Anders W. Sandvik, Olav F. Syljuasen
The directed-loop scheme is a framework for generalized loop-type updates in quantum Monte Carlo, applicable both to world-line and stochastic series expansion methods. Here, the d…
Specific heat of quasi-2D antiferromagnetic Heisenberg models with varying inter-planar couplings
Pinaki Sengupta, Anders W. Sandvik, Rajiv R. P. Singh
We have used the stochastic series expansion (SSE) quantum Monte Carlo (QMC) method to study the three-dimensional (3D) antiferromagnetic Heisenberg model on cubic lattices with in…