Non-perturbative improvement of the anisotropic Wilson QCD action

We describe the first steps in the extension of the Symanzik O(a) improveme nt program for Wilson-type quark actions to anisotropic lattices, with a te mporal lattice spacing smaller than the spatial one. This provides a fully relativistic and computationally efficient framework for the study of heavy quarks. We illustrate our method with accurate results for the quenched ch armonium spectrum.