Realizing efficient topological temporal pumping in electrical circuits

TL;DR

This paper demonstrates a topological adiabatic pump in an electrical circuit network, achieving stable voltage signal transport and characterizing its topology through Chern number measurement.

Contribution

It introduces a novel electrical circuit implementation of a topological pump using active, voltage-controlled inductors, enhancing efficiency and stability.

Findings

Stable long-lasting voltage pumping observed.

Chern number deduced from edge band structure.

Active circuit elements enable time-variable modulation.

Abstract

Quantized adiabatic transport can occur when a system is slowly modulated over time. In most realizations however, the efficiency of such transport is reduced by unwanted dissipation, back-scattering, and non-adiabatic effects. In this work, we realize a topological adiabatic pump in an electrical circuit network that supports remarkably stable and long-lasting pumping of a voltage signal. We further characterize the topology of our system by deducing the Chern number from the measured edge band structure. To achieve this, the experimental setup makes use of active circuit elements that act as time-variable voltage-controlled inductors.