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

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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.
Original languageEnglish
Article numberL012006
Pages (from-to)1-6
Number of pages6
JournalPHYSICAL REVIEW RESEARCH
Volume4
Issue number1
DOIs
Publication statusPublished - 28 Jan 2022
MoE publication typeA1 Journal article-refereed

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  • -: Lado Jose AT-palkka

    Lado, J.

    01/09/202031/08/2025

    Project: Academy of Finland: Other research funding

  • -: Lado Jose AT-kulut

    Lado, J., Hyart, T., Kumar, P. & Koch, R.

    01/09/202031/08/2023

    Project: Academy of Finland: Other research funding

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