The Anthony J Leggett Institute for Condensed Matter Special Theory Seminar, Philip W Phillips (UIUC), "Luttinger Theorem Failure as an Anomaly in a Generalized Symmetry"
Feb 23, 2026 12:00 - 1:00 pm
ESB 190
- Sponsor
- Physics - The Anthony J Leggett Institute for Condensed Matter Theory
- Speaker
- Philip W Phillips
- Contact
- Thierry Ramais
- ramais@illinois.edu
- Originating Calendar
- Physics - The Anthony J Leggett Institute for Condensed Matter Theory Seminar
Abstract: The Luttinger Theorem is viewed as an inviolate structure in condensed matter physics. This theorem is often stated as the invariance of the Fermi surface volume to interactions. More subtlety the theorem establishes the number of sign changes of the single-particle Green function as a conserved quantity, namely the physical charge. However, I will show that the theorem is not true in general. I will show that the failure of this theorem stems from an anomaly and hence is rooted in topology. Various failures of the theorem will be discussed in cuprate physics.
Zoom Link: https://illinois.zoom.us/my/icmt.seminar?pwd=ZU1KbnBLeXZLUmJKc0oyU205cDNDdz09
Meeting ID: 791 382 8328
Password: 106237