Scientific Calendar Event

Starts 7 Jun 2024 11:00
Ends 7 Jun 2024 12:00
Central European Time
Leonardo Building, Luigi Stasi Seminar Room (and via Zoom)

Christopher L. Baldwin
(Michigan State University)

Over the past two decades (and beyond), there has been an enormous amount of interest in the question of whether & how strong disorder can impede the "normal" functioning of an isolated many-body system (see the topic of many-body localization). Concurrently, a major topic in mathematical physics has been deriving rigorous speed limits on the spread of correlations/information, as formalized by Lieb-Robinson bounds. In this talk, I summarize our recent work marrying these two fields by quantifying how disorder modifies the conventional speed limits. We consider two cases --- disordered interactions and disordered fields --- specifically for one-dimensional spin chains. For both, we prove that sufficiently strong disorder can modify even the shape of the Lieb-Robinson "light cone", such that ballistic and even diffusive motion becomes impossible.