Special Emergent Phenomena Seminar 290S/QM Seminar Speaker Hart Goldman (MIT) Thursday, April 28 at 11:00 am

Time/Venue Thursday, April 28 at 11:00 am 375 Physics North and Zoom: https://berkeley.zoom.us/j/99523499113pwd=REovb3pyam03WXQwbEhrU3dqNHZvdz09 , Meeting ID: 995 2349 9113 Passcode: 600704
Host Ehud Altman
Title Exact results for metallic quantum critical points
Abstract I discuss how exact, non-perturbative results can be obtained for both optical transport and static susceptibilities in “Hertz-Millis” theories of Fermi surfaces coupled to critical bosons. Such models possess a large emergent symmetry and anomaly structure, which we leverage to fix these quantities. In particular, I will show that in the infrared limit, the boson self energy at zero wave vector is a constant independent of frequency, and the real part of the optical conductivity is purely a delta function Drude peak with no other corrections. I will also obtain exact relations between Fermi liquid parameters as the critical point is approached from the disordered phase.

This entry was posted in QM Seminar. Bookmark the permalink.