348 citations · 6.3k across the 139 of their papers we have counts for
6 papers · 1 filter
Linked Cluster Series Expansions for Two-Particle Bound States
Weihong Zheng, C. J. Hamer, R. R. P. Singh +2
We develop strong-coupling series expansion methods to study two-particle spectra of quantum lattice models. At the heart of the method lies the calculation of an effective Hamilto…
Deconfinement Transition and Bound States in Frustrated Heisenberg Chains: Regimes of Forced and Spontaneous Dimerization
Weihong Zheng, C. J. Hamer, R. R. P. Singh +2
We use recently developed strong-coupling expansion methods to study the two-particle spectra for the frustrated alternating Heisenberg model, consisting of an alternating nearest…
Strong-Coupling Expansions for Multiparticle Excitations: Continuum and Bound States
S. Trebst, H. Monien, C. J. Hamer +2
We present a new linked cluster expansion for calculating properties of multiparticle excitation spectra to high orders. We use it to obtain the two-particle spectra for systems of…
High-energy magnon dispersion and multi-magnon continuum in the two-dimensional Heisenberg antiferromagnet
Anders W. Sandvik, Rajiv R. P. Singh
We use quantum Monte Carlo simulations and numerical analytic continuation to study high-energy spin excitations in the two-dimensional S=1/2 Heisenberg antiferromagnet at low temp…
Two-magnon Raman scattering in spin-ladder geometries and the ratio of rung and leg exchange constants
P. J. Freitas, R. R. P. Singh
We discuss ways in which the ratio of exchange constants along the rungs and legs of a spin-ladder material influences the two-magnon Raman scattering spectra and hence can be dete…
Comment on "Kagome Lattice Antiferromagnet Stripped to Its Basics"
Steven R. White, Rajiv R. P. Singh
Density matrix renormalization group (DMRG) calculations on large systems (up to 3096 spins) indicate that the ground state of the Heisenberg model on a 3-chain Kagome strip is spo…