81 citations · 215 across the 6 of their papers we have counts for
6 papers
Slow dynamics of the Fredkin spin chain
Khagendra Adhikari, K. S. D. Beach
The dynamical behavior of a quantum many-particle system is characterized by the lifetime of its excitations. When the system is perturbed, observables of any non-conserved quantit…
Frustrating antiferromagnetic exchange interactions enhance specific valence-bond-pair motifs
Xiaoming Zhang, Jin Xu, K. S. D. Beach
We present variational results for the ground state of the antiferromagnetic quantum Heisenberg model with frustrating next-nearest-neighbour interactions. The trial wave functions…
Some formal results for the valence bond basis
K. S. D. Beach, A. W. Sandvik
In a system with an even number of SU(2) spins, there is an overcomplete set of states--consisting of all possible pairings of the spins into valence bonds--that spans the S=0 Hilb…
Site dilution of quantum spins in the honeycomb lattice
Eduardo V. Castro, N. M. R. Peres, K. S. D. Beach +1
We discuss the effect of site dilution on both the magnetization and the density of states of quantum spins in the honeycomb lattice, described by the antiferromagnetic Heisenberg…
Comment on "High Precision Measurement of the Thermal Exponent for the three-dimensional XY Universality Class"
K. S. D. Beach
A recent paper [Burovski et al., cond-mat/0507352] reports on a new, high-accuracy simulation of the classical phi^4 model (in the three-dimensional XY universality class). The aut…
Field-induced Antiferromagnetism and the Kondo Insulator-to-Metal Transition
K. S. D. Beach, Patrick A. Lee, P. Monthoux
The Kondo lattice model, augmented by a Zeeman term, serves as a useful model of a Kondo insulator in an applied magnetic field. A variational mean field analysis of this system on…