Joel Moore (SIMES Friday Seminar)

Date(s) - Feb 7 2014
11:00 AM - 12:30 PM

Shasta Room, Bldg. 40, Room 361


Some basic questions about quantum nonequilibrium physics, and how ultrafast experiments might answer them

Joel E. Moore

Faculty Scientist, Lawrence Berkeley National Laboratory

Associate Professor of Physics, University of California, Berkeley

The first part of this talk explains how recent advances in analytical theory and numerical methods enable some long-standing questions about dynamics in one-dimensional quantum systems to be answered.  These questions are closely related to transport experiments in quasi-1D compounds and increasingly to optical experiments.  We study ballistic and diffusive transport in the translation-invariant case and explain how a Drude weight emerges from a highly nontrivial conserved quantity.  Adding disorder, we study the question of how Anderson localization is modified by interactions when the system remains fully quantum coherent (“many-body localization”).  We find that even weak interactions are a singular perturbation on some quantities: entanglement grows slowly but without limit, suggesting that dynamics in the possible many-body localized phase are glass-like.  The second part of the talk briefly covers some past and present efforts to use optical experiments to detect Berry-phase properties and pumped topological states.