Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session Z10: Lasers, quantum emitters, quantum optics
10:30 AM–12:30 PM,
Friday, June 4, 2021
Chair: Elohim Becerra, UNM
Abstract: Z10.00003 : Floquet-topological behavior of finite and infinite square lattices with different driving schemes
10:54 AM–11:06 AM
Live
Presenter:
Helena Drueeke
(University of Rostock)
Authors:
Helena Drueeke
(University of Rostock)
Dieter Bauer
(University of Rostock)
Collaborations:
Helena Drüeke, Dieter Bauer
Hoppings between neighboring sites vary according to discrete, temporally and spatially periodic driving schemes. Some schemes allow topologically protected edge currents to flow around the system's borders while its bulk remains insulating. Such systems are called Floquet-topological insulators.
In addition to hoppings, the system's Hamiltonian contains on-site potentials, varying for individual or groups of lattice sites. Possible variations are single-site defects, linear disruptions, or spatially periodic (e.g., alternating) variations.
By varying the hopping scheme and on-site potentials, we can confine the particle to a localized, periodic movement (insulating behavior) or switch to long-range motion through the system (conducting). In an experimental realization in photonic lattices, this corresponds to steering light within a waveguide array.
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