Topological pumping in Aharonov-Bohm rings

TL;DR

This paper explores the combination of topological Thouless pumping and Aharonov-Bohm effects in interacting particle systems, enabling entangled state preparation, topological transport, and quantum interference for sensing.

Contribution

It introduces a novel system that integrates topological pumping with Aharonov-Bohm rings, revealing new interference patterns and transport mechanisms for many-particle states.

Findings

Able to prepare highly entangled states

Demonstrates topological transport with a particle-number-dependent band gap

Reveals fractional flux quantum through interference patterns

Abstract

Topological Thouless pumping and Aharonov-Bohm effect are both fundamental effects enabled by the topological properties of the system. Here, we study both effects together: topological pumping of interacting particles through Aharonov-Bohm rings. This system can prepare highly entangled many-particle states, transport them via topological pumping and interfere them, revealing a fractional flux quantum. The type of the generated state is revealed by non-trivial Aharonov-Bohm interference patterns that could be used for quantum sensing. The reflections induced by the interference result from transitions between topological bands. Specific bands allow transport with a band gap scaling as the square-root of the particle number. Our system paves a new way for a combined system of state preparation and topological protected transport.