@article{Frommer:2025XC, author = "Frommer, Andreas and Jimenez-Merchan, Jose and Ramirez-Hidalgo, Gustavo", title = "{Variance Reduction in Trace Estimation for Lattice QCD Using Multigrid Multilevel Monte Carlo}", doi = "10.22323/1.466.0279", journal = "PoS", year = 2025, volume = "LATTICE2024", pages = "279" }