University of Chicago

Place: Rm M830, IOP-CAS

Abstract:

I will show how to formulate Fermi liquid theory as an effective field theory of bosonic degrees of freedom, using the formalism of coadjoint orbits. While at the linear level, this theory reduces to multidimensional bosonization, it necessarily features nonlinear corrections that are fixed by the geometry of the Fermi surface. These are crucial to reproduce nonlinear response, which is not captured by previous bosonization approaches. The effective field theory framework furthermore systematically parametrizes power law corrections to Fermi liquid behavior, and provides a computationally advantageous approach for non-Fermi liquids -- strongly interacting fixed points obtained by deforming Fermi liquids with relevant interactions.

More details can be found in http://seminar.cpsjournals.cn/