In 1988, Ben Arous became a professor at the University of Paris-Sud where he served as the chair of the mathematics department from 1992 to 1994. From 1994 to 1997 he was a professor at ENS and the chair of the mathematics and computer science departments. From 1997 to 2007, Ben Arous was a professor of applied probability theory at the École Polytechnique Fédérale de Lausanne, where he held the chair of Stochastic Modeling and founded the Bernoulli Institute in 2001. Since 2002 he has been a professor at the Courant Institute of Mathematical Sciences of New York University. In 2009, Ben Arous served as acting Director of the Courant Institute and was director from 2011 to 2016. He was appointed as the Vice-Provost for Science and Engineering Development at New York University in 2011.[1]
Professor Ben Arous works on probability theory (stochastic analysis, large deviations, random media and random matrices) and its connections with other domains of mathematics (partial differential equations, dynamical systems), physics (statistical mechanics of disordered media), or industrial applications. He is mainly interested in the time evolution of complex systems, and the universal aspects of their long time behavior and of their slow relaxation to equilibrium, in particular how complexity and disorder imply aging. He is a Fellow of the Institute of Mathematical Statistics (as of August 2011) and an elected member of the International Statistical Institute.[1]
Ben Arous, Gérard; Černý, Jiří (2006). "Dynamics of trap models". In Bovier, Anton; Dunlop, François; van Enter, Aernout; den Hollander, Frank; Dalibard, Jean (eds.). Mathematical Statistical Physics: Papers from the 83rd Session of the Summer School in Physics held in Les Houches, July 4–29, 2005. Amsterdam: Elsevier B. V. pp. 331–394. arXiv:math/0603344. doi:10.1016/S0924-8099(06)80045-4. ISBN978-0-444-52813-1. MR2581889.