Speaker
Erez Berg
Description
Periodically driven quantum systems, such as
semiconductors subject to light and cold atoms in optical
lattices, provide a noveland versatile platform for realizing
topological phenomena. Some of these are analogs of
topological insulators andsuperconductors, attainable also in
static systems; others are unique to the periodically driven
case. I will describe how periodic
driving, disorder, and interactions can conspire to give rise to
new robust steady states, with no analogues in static
systems. In disordered two-dimensional driven systems, a
phase with chiral edge states and fully localized bulk states is
possible; this phase can realize a non-adiabatic quantized
charge pump. In interacting one dimensional driven systems,
current carrying states with excessively long life times can
arise.
