Dvali is best known for the
ADD model, which he proposed together with
Nima Arkani-Hamed and
Savas Dimopoulos in 1998. It is a scenario inspired by
string theory to explain the relative weakness of gravity to other forces, in which the
Standard Model fields are confined to a (3+1)-dimensional membrane but gravity can also propagate in additional transverse spatial dimensions that are compact but may be as large as one-tenth of a millimeter. In this framework
quantum gravity, string theory, and
black holes may be experimentally investigated at the
Large Hadron Collider. Dvali's work also includes the large-distance modification of
gravity and its application to the
cosmological constant problem. With
Gregory Gabadadze and
Massimo Porrati he co-pioneered and advanced this direction by proposing a generally covariant model of infrared modification of gravity (the so-called
DGP model), and studying many novel and subtle features of this class of models. Giorgi Dvali was invited to the 25th Solvay Conference in Brussels to participate in the discussion of "The Theory of the Quantum World". Dvali is actively engaged in teaching activities. During 1997–1998, he was a professor at ICTP. Currently, he is a professor of theoretical physics at New York University (Center for Cosmology and Particle Physics) and
LMU Munich, as well as the director of the Max Planck Institute for Physics (Munich) and a scientist-collaborator at the CERN Center for Atomic Research in Geneva. He is also a distinguished professor of the
Free University of Tbilisi. ==Honours and awards==