82 citations · 85 across the 3 of their papers we have counts for
9 papers · 1 filter
Coherence and metamagnetism in the two-dimensional Kondo lattice model
K. S. D. Beach, F. F. Assaad
We report the results of dynamical mean field calculations for the metallic Kondo lattice model subject to an applied magnetic field. High-quality spectral functions reveal that th…
Comment on "Quantum Monte Carlo scheme for frustrated Heisenberg antiferromagnets"
K. S. D. Beach, Matthieu Mambrini, Fabien Alet
Quantum Monte Carlo methods are sophisticated numerical techniques for simulating interacting quantum systems. In some cases, however, they suffer from the notorious "sign problem"…
Mean Field study of the heavy fermion metamagnetic transition
S. Viola Kusminskiy, K. S. D. Beach, A. H. Castro Neto +1
We investigate the evolution of the heavy fermion ground state under application of a strong external magnetic field. We present a richer version of the usual hybridization mean fi…
Valence bond description of the long-range, nonfrustrated Heisenberg chain
K. S. D. Beach
The Heisenberg chain with antiferromagnetic, powerlaw exchange has a quantum phase transition separating spin liquid and Neel ordered phases at a critical value of the powerlaw exp…
Fractal valence bond loops in a long-range Heisenberg model at criticality
K. S. D. Beach
We present a valence bond theory of the spin-S quantum Heisenberg model. For nonfrustracting, local exchange and dimension d > 1, it predicts a resonating ground state with bond am…
Monte Carlo Simulations of Quantum Spin Systems in the Valence Bond Basis
A. W. Sandvik, K. S. D. Beach
We discuss a projector Monte Carlo method for quantum spin models formulated in the valence bond basis, using the S=1/2 Heisenberg antiferromagnet as an example. Its singlet ground…