Circuit implementation of a four-dimensional topological insulator

@article{Wang2020CircuitIO,
title={Circuit implementation of a four-dimensional topological insulator},
author={You Wang and H. Price and B. Zhang and Y. Chong},
journal={Nature Communications},
year={2020},
volume={11}
}

The classification of topological insulators predicts the existence of high-dimensional topological phases that cannot occur in real materials, as these are limited to three or fewer spatial dimensions. We use electric circuits to experimentally implement a four-dimensional (4D) topological lattice. The lattice dimensionality is established by circuit connections, and not by mapping to a lower-dimensional system. On the lattice’s three-dimensional surface, we observe topological surface states… Expand