Professor of Theoretical Physics, Instituto de Física de São Carlos, University of São Paulo. BSc and MSc — University of São Paulo. PhD — Cornell University (1980). Post-doctoral researcher — University of California at Santa Barbara (1986-1988). Visiting scholar — The Ohio State University (1994-1995).
Member of the São Paulo State Academy of Science and of the Brazilian Academy of Science. Medal of Scientific Merit from the Ministry of Science, Technology, and Innovation. Research Provost — University of São Paulo (2001-2005). Editor in Chief — Brazilian Journal of Physics (2011-2014).
His work has been split between two research lines: strongly correlated electronic systems and Density-Functional Theory. Along the former, his research has supported the development of the numerical renormalization-group method, first introduced by Kenneth G. Wilson in 1975, and made a number of novel applications to impurity models. Along the later research line, he has collaborated with Eberhard K. U. Gross and Walter Kohn to develop density-functional formalisms for superconductors and for ensembles of excited states, and with Klaus Capelle to develop a formulation for one-dimensional strongly correlated systems. Currently, his research group is working on a formalism to describe the transport properties of molecular junctions.
At FAPESP, he worked as Area Coordinator and Adjunct Coordinator, from 1988 to 2001, and has worked as Adjunct Coordinator for Special Programs and Research Collaborations since 2017.