Non-Hermitian many-body topological excitations in interacting quantum dots

TL;DR

This paper demonstrates the realization of non-Hermitian many-body topological modes in quantum dot chains through tunable dissipation, showing their robustness against strong interactions and potential for quantum engineering.

Contribution

It introduces a method to create non-Hermitian topological modes in quantum dots via dissipation modulation, highlighting their stability in interacting many-body systems.

Findings

Non-Hermitian topological modes can be realized in quantum dot chains.

These modes are robust against strong electronic interactions.

Quantum dot arrays can serve as platforms for non-Hermitian topological states.

Abstract

Quantum dots are one of the paradigmatic solid-state systems for quantum engineering, providing an outstanding tunability to explore fundamental quantum phenomena. Here we show that non-Hermitian many-body topological modes can be realized in a quantum dot chain by utilizing a gate-tunable modulation of dissipation, and they emerge purely because of the non-Hermiticity. By exactly solving the non-Hermitian interacting description both with exact diagonalization and tensor-networks, we demonstrate that these topological modes are robust even in the presence strong interactions, leading to a strongly correlated topological many-particle state. Our results put forward quantum dot arrays as a platform for engineering non-Hermitian many-body topological modes, and highlight the resilience of non-Hermitian topology to electronic interactions.