Critical scaling corrections in 2D dimerized antiferromagnets*

2D dimerized antiferromagnets can be driven through a quantum-critical point by tuning the ratio $g = J2/J1$ between inter- and intra-dimer couplings. It has been shown [1] that the systems fall into two classes, depending on whether or not a certain bond-inversion symmetry is present in the dimer pattern. The two classes should have the same leading critical exponents but different expo- nents controlling the scaling corrections. We here investigate the scaling correc- tions using quantum Monte Carlo simulations for several different dimerization patterns. We will discuss systematic methods to extract the scaling corrections in the thermodynamic limit. \bibitem{try} [1]L. Fritz, R. L. Doretto, S. Wessel, S. Wenzel, S. Burdin, and M. Vojta, Phys. Rev. B 83, 174416 (2011).