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    Exciton-polariton hybrid skin-topological states

    Ruiqi Bao1,2,*, R. Banerjee2,3, S. Mandal4, Huawen Xu5, Shiji Li1, Junfeng Gao1,†, and Timothy C. H. Liew2,‡

    • *Contact author: ruiqi002@e.ntu.edu.sg
    • †Contact author: gaojf@dlut.edu.cn
    • ‡Contact author: timothyliew@ntu.edu.sg

    Phys. Rev. B 114, 165305 – Published 28 September, 2026

    DOI: https://doi.org/10.1103/qrxc-7rdw

    Abstract

    The non-Hermitian skin effect, where bulk states accumulate at system boundaries, challenges the conventional bulk-boundary correspondence. Here we propose a scheme to realize hybrid skin-topological states in exciton polariton honeycomb lattices by introducing sublattice-dependent gain and loss. This non-Hermiticity couples with the intrinsic topological edge modes, leading to relocalization of edge states. We show two distinct regimes: hybrid skin-Chern states with reversible localization controlled by TE-TM splitting (characterized by a change in spectral winding number from w=2 to w=−1), and hybrid skin-antichiral states which preserves the spin-polarized property. Our results bridge polariton spin physics and non-Hermitian topology, opening routes toward controllable nonreciprocal and spin-polarized transport.

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