School of Physical Sciences
Jawaharlal Nehru University
Electric Circuits: A Tunable Platform for Topological Matter
Prof. Ronny Thomale
(University of Wuerzburg, Germany)
Date: November 16, 2022 Time: 4:00 PM
Venue: Seminar Hall, SPS
Abstract: Pioneered by topological insulators and semimetals, topological states of matter have shaped a significant part of contemporary condensed matter physics, and have largely branched out into adjacent fields such as photonics, mechanics, and other metamaterial setups. Recently, the frontier has shifted to topological systems which embody enrichments imposed by Floquet theory, non-Hermiticity, and non-linearity. In analogy to the paradigmatic example of the drosophila as the biological system most amenable to studies of genetic functionality, we establish electric circuit networks as the canonical platform for the study of topological states of matter. We explore the topological functionality of circuit networks realizable through the plethora of available electronic components, which have been perfected through decades of industrial refinement. Approaching topology from different angles involves circuit network realizations of periodic driving, gain and loss, non-reciprocity, and synthetic dimensions. The combination of node-resolved measurability, flexibility of boundary conditions, and local as well as non-local defect tunability ensures a large scope of diagnostic settings. The outstanding accessibility and scalability of electric circuit metamaterials provides a new laboratory for topological matter.