University of Cambridge > > Quantum Fields and Strings Seminars > On the Taxonomy of Holographic Fermi/Non-Fermi Liquids

On the Taxonomy of Holographic Fermi/Non-Fermi Liquids

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If you have a question about this talk, please contact Sungjay Lee.

The existence of Non-Fermi liquids which are not described by Landau’s Fermi liquids is a fascinating puzzle in theoretical physics. In this talk, I will show universal field theories where we can go around the Landau’s Fermi-liquids and obtain Non-Fermi-Liquid behavior. These field theories contain dynamical singlet fermions which couple through fermion bilinear terms to strongly coupled sectors which are characterized by its ``dynamical scaling’’. Suppose these strongly coupled sectors have gravity dual (which is not necessarily anti-de Sitter space), then by using powerful gauge/gravity duality, I will argue how these dynamical scaling parameters determine the natures of the dynamical singlet fermions in a very universal way; These natures include the existence of Fermi-/Non-Fermi liquids, sharp Fermi-surface, the decay rates and breakdown of the quasi-particles description. I will end with discussion for generalization of our work to include the lattice effects and impurities for more interesting condensed matter system.

This talk is part of the Quantum Fields and Strings Seminars series.

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