Istituto di Elettronica Quantistica, then Istituto di Fisica Applicata, CNR (December 2001 - July 2004)
Istituto Nazionale per la Fisica della Materia, UdR Firenze (August 1999 - December 2001)
Theoretische Physik, Universität Essen (September 1997 - February 1998 and January - July 1999)
Dipartimento di Fisica, Università di Firenze (1997-1998)
Département de Recherche Fondamentale sur la Matière Condenseée, CEA-Grenoble (1995-1996) [Marie Curie Fellowship]
Liceo Scientifico Leonardo da Vinci, Firenze (1978-1983)
Institut for Theoretical Physics, University of Cologne (February 2016 and October 2023)
LPTHE, Sorbonne Université (January 2019)
Laboratoire Interdisciplinaire de Physique, CNRS-Grenoble (October 2015 and several visits over the years)
MPIPKS-Dresden (August - September 2014)
Institut Lumière Matière, CNRS-Lyon (November - December 2012)
School of Physics, Glasgow University (September 2011)
School of Physics, University of Western Australia, Perth, Australia (November - December 2010, November - December 2006, and September - October 2005)
Department of Physics, Clarkson University, NY, USA (May - June 2010)
Department of Physics, Keio University, Japan (April - June 2004)
Centre de Recherche sur les Très Basses Températures, CNRS-Grenoble (October-December 1996)
Commissariat à l'énergie atomique, Grenoble (1995-1996)
ETH-Zürich (a few times, mainly during 1991-1994)