Topological atomic spinwave lattices by dissipative couplings

Abstract

Recent experimental advance in creating dissipative couplings provides a new route for engineering exotic lattice systems and exploring topological dissipation. Using the spatial lattice of atomic spinwaves in a vacuum vapor cell, where purely dissipative couplings arise from diffusion of atoms, we experimentally realize a dissipative version of the Su-Schrieffer-Heeger (SSH) model. We construct the dissipation spectrum of the topological or trivial lattices via electromagnetically-induced-transparency (EIT) spectroscopy. The topological dissipation spectrum is found to exhibit edge modes within a dissipative gap. We validate chiral symmetry of the dissipative SSH couplings, and also probe topological features of the generalized dissipative SSH model. This work paves the way for realizing non-Hermitian topological quantum optics via dissipative couplings.

arXiv comment6 pages, 4 figures

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• Realizing exceptional points by Floquet dissipative couplings in thermal atoms
• Fractional Quantum Zeno Effect Emerging from Non-Hermitian Physics
• Topological transitions in dissipatively coupled Su-Schrieffer-Heeger models
• Velocity Scanning Tomography for Room-Temperature Quantum Simulation
• Nonreciprocity Induced Fractional Nonlinear Thouless Pumping
• Anomalous Point-Gap Interactions Unveil the Mirage Bath