The physics of exceptional points

Stefan Rotter (TU Vienna) — June 1st

Abstract :
In my talk I will discuss the recent exciting developments associated with non-Hermitian degeneracies, also known as “exceptional points”. After having been studied mostly in the domain of mathematical physics, quite a number of experiments have recently demonstrated how the presence of exceptional points leads to very counter-intuitive effects, such as loss-induced lasing, chiral field modes, topological energy transfer etc. I will try to provide an introduction to this topic as well as an overview of the many different areas of physics in which exceptional points are meanwhile being explored.

Biography :
Stefan Rotter is a professor of theoretical physics at Vienna University of Technology in Austria. After his studies in Vienna and Lausanne, he worked as a postdoc at Yale University. On his return to Vienna he set up his own group with a focus on waves in disordered media, non-Hermitian physics, laser theory and quantum optics. On these topics the Rotter group also frequently collaborates with experimental teams, many of which are based in France.

You can also watch this video on savoirs.ens.fr