CMSA Quantum Matter in Mathematics and Physics: Families of gapped systems and quantum pumps


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February 11, 2021 10:30 am - 12:00 pm
via Zoom Video Conferencing

Michael Hermele - UC Boulder

Gapped phases of matter, including topological and fracton phases, are deformation classes of gapped quantum systems, and exhibit a rich array of phenomena. An interesting generalization is to consider parametrized families of gapped systems, and the deformation classes of such families. This talk will describe examples of such parametrized families and their physical properties in the bulk and at spatial boundaries. In particular, we will describe a family of one-dimensional systems that realizes a Chern number pump, which can change the quantized Chern number of a zero-dimensional family placed at its boundary.