Efficient nonreciprocal mode transitions in spatiotemporally modulated acoustic metamaterials

Z Chen, Y Peng, H Li, J Liu, Y Ding, B Liang, XF Zhu… - Science …, 2021‏ - science.org
In linear, lossless, time-invariant, and nonbiased acoustic systems, mode transitions are time
reversible, consistent with Lorentz reciprocity and implying a strict symmetry in space-time …

Chip-scale Floquet topological insulators for 5G wireless systems

A Nagulu, X Ni, A Kord, M Tymchenko, S Garikapati… - Nature …, 2022‏ - nature.com
Floquet topological insulators, which have an exotic topological order sustained by time-
varying Hamiltonians, could be of use in a range of technologies, including wireless …