DIAS Headquarters, 10 Burlington Road - D04C932 contact@dias.ie 00353 (0) 16140100
Loading Events

« All Events

  • This event has passed.

STP Seminar – Dr. Maresa Rieder

7th February 2019 @ 2:30 pm - 3:30 pm

Speaker: Dr. Maresa Rieder

Abstract: 

The topological phases of periodically driven, or Floquet systems, rely on a perfectly periodic modulation of system parameters in time. Even the smallest deviation from periodicity leads to decoherence, causing the boundary (end) states to leak into the system’s bulk. Here, we show that in one dimension this decay of topologically protected end states depends fundamentally on the nature of the bulk states: a dispersive bulk results in an exponential decay, while a localized bulk slows the decay down to a diffusive process. The localization can be due to disorder, which remarkably counteracts decoherence even when it breaks the symmetry responsible for the topological protection. We derive this result analytically, using a novel, discrete-time Floquet-Lindblad formalism and confirm our findings with the help of numerical simulations.

  • Location: Lecture Room, 1st Floor, School of Theoretical Physics, DIAS, 10 Burlington Road, Dublin 4

Details

Date:
7th February 2019
Time:
2:30 pm - 3:30 pm
Event Category:

Venue

Burlington Road
View Venue Website