Michael Aizenman (born 28 August 1945 in Nizhny Tagil, Russia) is an American - Israeli mathematician and a physicist at Princeton University, working in the fields of mathematical physics, statistical mechanics, functional analysis and probability theory.
The highlights of his work include: the triviality of a class of scalar quantum field theories in more than four dimensions; a description of the phase transition in the Ising model in three and more dimensions; the sharpness of the phase transition in percolation theory; a method for the study of spectral and dynamical localization for random Schrödinger operators; and insights concerning conformal invariance in two-dimensional percolation.