Seminar "Low Energy Physics of a Non-Fermi Liquid System" by Ipsita Mandal

Theory of Quantum Matter Unit invites you to a seminar by Dr. Ipsita Mandal.

• Title:  Low Energy Physics of a Non-Fermi Liquid System
• Speaker:  Dr. Ipsita Mandal (Perimeter Institute for Theoretical Physics)
• Date/Time:  Friday, June 12^th / 13:30-14:30
• Venue:  C016, Lab1
• Abstract:   We devise a renormalization group analysis for quantum field theories with Fermi surface to study scaling behaviour of non-Fermi liquid states in a controlled approximation. The non-Fermi liquid fixed points are identified from a Fermi surface in (m+1) spatial dimensions, while the co-dimension of Fermi surface is also extended to a generic value. We also study superconducting instability in such systems as a function of dimension and co-dimension of the Fermi surface. The key point in this whole analysis is that unlike in relativistic QFT, the Fermi momentum $k_F$ enters as a dimensionful parameter, thus modifying the naive scaling arguments. The effective coupling constants are found to be combinations of the original coupling constants and $k_F$.