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

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.

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• Symmetry-protected quantization of complex Berry phases in non-Hermitian many-body systems
• Breaking and resurgence of symmetry in the non-Hermitian Su-Schrieffer-Heeger model in photonic waveguides
• Topological phase diagrams of exactly solvable non-Hermitian interacting Kitaev chains
• Non-Hermitian topology and criticality in photonic arrays with engineered losses
• Symmetry protected exceptional points of interacting fermions
• Multifractality of many-body non-Hermitian skin effect
• Non-Hermitian Haldane-Hubbard model: Effective description of one- and two-body dissipation
• Transfer learning from Hermitian to non-Hermitian quantum many-body physics
• Operator correlations in a quenched non-Hermitian Luttinger liquid
• Non-Hermitian topological quantum states in a reservoir-engineered transmon chain
• Non-Hermitian chiral anomalies in interacting systems
• Topology and criticality in non-Hermitian multimodal optical resonators through engineered losses