Recent polarized inelastric neutron scattering experiments have identified the amplitude (i.e. Higgs) mode in C9H18N2CuBr4, a 2-D, near-quantum-critical spin ladder compound that exhibits a weak easy-axis exchange anisotropy. Inspired by these findings, researchers at RWTH Aachen University, Harbin Institute of Technology and the University of Erlangen-Nürnberg have carried out a study examining the dynamic spin structure factor of planar coupled spin-ladder systems using large-scale quantum Monte Carlo (QMC) simulations.
Source: https://phys.org/news/2019-04-qmc-simulations-dynamic-planar-coupled.html