Speaker
Description
In this talk, we present a study of the performance of low-mode averaging (LMA) techniques on twisted-mass fermion ensembles at near-physical quark masses, assessing both their theoretical foundations and practical cost-effectiveness in contemporary lattice QCD. We focus on light-quark meson and baryon observables and perform a detailed numerical investigation of the resulting variance reduction. For mesonic observables, we compare two implementations of LMA: a standard exact approach based on explicitly computed low-lying eigenmodes and an approximate high-statistics variant that exploits multigrid techniques. In addition, we present a comprehensive study of the eigenvalue density of the massless Wilson operator and related spectral observables, providing further insight into the role of low modes in lattice calculations.