Chiral-Extended Photon-Emitter Dressed States in Non-Hermitian Topological Baths

• URL: http://arxiv.org/abs/2408.07603v2
• Date: Thu, 22 Aug 2024 15:19:34 GMT
• Title: Chiral-Extended Photon-Emitter Dressed States in Non-Hermitian Topological Baths
• Authors: Zhao-Fan Cai, Xin Wang, Zi-Xuan Liang, Tao Liu, Franco Nori,
• Abstract summary: We predict unconventional quantum optical behaviors of quantum emitters coupled to a non-Hermitian topological bath. In addition to the Hermitian-like chiral bound states in the middle line gap and skin-mode-like hidden bound states inside the point gap, we identify peculiar in-gap chiral and extended photon-emitter dressed states.
• Score: 5.9025944049240575
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The interplay of quantum emitters and non-Hermitian structured baths has received increasing attention in recent years. Here, we predict unconventional quantum optical behaviors of quantum emitters coupled to a non-Hermitian topological bath, which is realized in a 1D Su-Schrieffer-Heeger photonic chain subjected to nonlocal dissipation. In addition to the Hermitian-like chiral bound states in the middle line gap and skin-mode-like hidden bound states inside the point gap, we identify peculiar in-gap chiral and extended photon-emitter dressed states. This is due to the competition of topological-edge localization and non-Hermitian skin-mode localization in combination with the non-Bloch bulk-boundary correspondence. Furthermore, when two emitters are coupled to the same bath, such in-gap dressed states can mediate the nonreciprocal long-range emitter-emitter interactions, with the interaction range limited only by the dissipation of the bath. Our work opens the door to further study rich quantum optical phenomena and exotic many-body physics utilizing quantum emitters coupled to non-Hermitian topological baths.

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