Guido Caldarelli (born in Rome on April 8, 1967) is an Italian physicist (statistical physics) and associate professor at IMT Institute for Advanced Studies Lucca. He is married with two children and lives in Lucca.
Caldarelli received his Ph.D. from SISSA, after which he was a postdoc in the Department of Physics and School of Biology, University of Manchester. He then worked at the Theory of Condensed Matter Group, University of Cambridge, where he worked with Robin Ball and stayed in Wolfson College. He returned to Italy as a lecturer at National Institute for Condensed Matter (INFM) and later as Primo Ricercatore in the Institute of Complex Systems of the National Research Council of Italy. In this period he was also the coordinator of the Networks subproject, part of the Complexity Project, for the Fermi Centre. He also spent some terms at University of Fribourg (Switzerland) and in 2006 he has been visiting professor at École Normale Supérieure in Paris.
The activity of Caldarelli is mainly focused on scale-free networks, complex networks and systems biology. He has been coordinator of the European project COSIN, one of the first international activities based on the study of complex networks. He is presently coordinator of the European project FOC on the study of financial networks and the project MULTIPLEX on Multi-level Complex Networks.
He has published numerous papers in physics and interdisciplinary journals, including Physical Review Letters and Nature.
Caldarelli is the author of Scale-free networks a textbook for graduate students published by Oxford University Press. He also edited with World Scientific Press another book Large Scale Structure and Dynamics of Complex Networks on the activity of COSIN project. In 2012 he published together with the colleague and journalist Michele Catanzaro the book Networks: A Very Short Introduction by Oxford University Press.