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Utkarsh Agrawal (University of Massachusetts, Amherst)
Date & Time
Tue, 21 June 2022, 14:00 to 15:30
Online and Emmy Noether Seminar Room

Integrable systems have an extensive number of stable quasiparticles which leads to a rich diversity of charge transport. In this talk, I will focus on the paradigmatic model of the XXZ spin chain. In the easy-plane regime of XXZ spin chains, spin transport is ballistic, with a Drude weight that has a discontinuous fractal dependence on the value of the anisotropy ∆. I will show that this structure necessarily implies the divergence of the low-frequency conductivity. I will then use the framework of generalized hydrodynamics (GHD) to tie the anomalous response to the Levy flight of quasiparticles.

Zoom link:
Meeting ID: 891 8372 6486
Passcode: 212122