Robust temporal pumping in a magneto-mechanical topological insulator
Abstract
The transport of energy through 1-dimensional (1D) waveguiding channels can be affected by sub-wavelength disorder, resulting in undesirable localization and backscattering phenomena. However, quantized disorder-resilient transport is observable in the edge currents of 2-dimensional (2D) topological band insulators with broken time-reversal symmetry. Topological pumps are able to reduce this higher-dimensional topological insulator phenomena to lower dimensionality by utilizing a pumping parameter (either space or time) as an artificial dimension. Here we demonstrate the first temporal topological pump that produces on-demand, robust transport of mechanical energy using a 1D magneto-mechanical metamaterial. We experimentally demonstrate that the system is uniquely resilient to defects occurring in both space and time Our findings open a new path towards exploration of higher-dimensional topological physics with time as a synthetic dimension.
Cite
@article{arxiv.1905.02778,
title = {Robust temporal pumping in a magneto-mechanical topological insulator},
author = {Inbar Hotzen Grinberg and Mao Lin and Cameron Harris and Wladimir A. Benalcazar and Christopher W. Peterson and Taylor L. Hughes and Gaurav Bahl},
journal= {arXiv preprint arXiv:1905.02778},
year = {2019}
}
Comments
Total number of pages 39, 17 pages are the main text and the rest are supplementary material. There are 5 figures in the main text and 17 figures in the supplementary section