PIRSA:16120009

Low energy field theories for non-Fermi liquids

Lee, S. (2016). Low energy field theories for non-Fermi liquids. Perimeter Institute. https://pirsa.org/16120009

Lee, Sung-Sik. Low energy field theories for non-Fermi liquids. Perimeter Institute, Dec. 07, 2016, https://pirsa.org/16120009 

          @misc{ pirsa_PIRSA:16120009,
            doi = {10.48660/16120009},
            url = {https://pirsa.org/16120009},
            author = {Lee, Sung-Sik},
            keywords = {Other},
            language = {en},
            title = {Low energy field theories for non-Fermi liquids},
            publisher = {Perimeter Institute},
            year = {2016},
            month = {dec},
            note = {PIRSA:16120009 see, \url{https://pirsa.org}}
          }

Sung-Sik Lee

McMaster University

Talk number
PIRSA:16120009
Collection
Talk Type
Subject
Abstract

 Non-Fermi liquids are exotic metallic states which do not support well defined quasiparticles. Due to strong quantum fluctuations and the presence of extensive gapless modes near the Fermi surface, it has been difficult to understand universal low energy properties of non-Fermi liquids reliably.  In this talk, we will discuss recent progress made on field theories for non-Fermi liquids. Based on a dimensional regularization scheme which tunes the number of co-dimensions of Fermi surface, critical exponents that control scaling behaviors of physical observables can be computed in controlled ways. The systematic expansion also provides important insight into strongly interacting metals. This allows us find the non-perturbative solution for the strange metal realized at the antiferromagnetic quantum critical point in 2+1 dimensions and predict the exact critical exponents.