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Disorder-induced quantized pumping in a Floquet topological phase

December 16, 2016 - 12:10am
Paraj Titum

In this talk, we show that two-dimensional periodically driven quantum systems with spatial disorder admit a unique topological phase. This phase is characterized by a quasi-energy spectrum featuring chiral edge modes coexisting with a fully localized bulk. Such a spectrum is impossible for a time-independent, local Hamiltonian. These unique characteristics give rise to a new topologically protected non-equilibrium transport phenomenon: quantized, yet non-adiabatic, charge pumping. This phase is separated from a trivial Anderson insulating phase by a phase transition.

Lunch served at 12pm!

PSC 2136, MD 20742