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Institute for Condensed Matter Theory Seminar: "Topological phases in disordered and driven systems"

Event Type
The Physics Department
190 ESB
Feb 18, 2019   12:00 pm  
Hoi Chun (Adrian) Po, Massachusetts Institute of Technology
Originating Calendar
Physics - Institute for Condensed Matter Theory Seminar

Periodically driven quantum systems, aka Floquet systems, have been recently identified as a prime platform for the study of topologically nontrivial quantum dynamics. Absent the notion of ground state(s), many-body localization (MBL) plays a crucial role in the definition of such dynamical phases. Strikingly, some of the discovered phases are intrinsically dynamical, in the sense that they do not admit static counterparts. In this talk, I will describe our results on the study of chiral phases in this context. These chiral phases are compatible with the notion of MBL---an impossibility in static systems. I will first discuss the analog of the integer quantum Hall phases, where instead of charge or heat, quantum information is pumped along the edge in a unidirectional manner. Next, I will present an extension of this phase into one featuring intrinsic topological order, where the pumping of emergent Majorana fermions along the edge is accompanied by a necessary dynamical anyon transmutation in the bulk.


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