Topological Atomic Spin Wave Lattices by Dissipative Couplings

Recent experimental advances in creating dissipative couplings provide a new route for engineering exotic lattice systems and exploring topological dissipation. Using the spatial lattice of atomic spin waves in a vacuum vapor cell, where purely dissipative couplings arise from diffusion of atoms, we...

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Published in:Physical review letters 2023-04, Vol.130 (15), p.153602-153602, Article 153602
Main Authors: Hao, Dongdong, Wang, Lin, Lu, Xingda, Cao, Xuzhen, Jia, Suotang, Hu, Ying, Xiao, Yanhong
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description Recent experimental advances in creating dissipative couplings provide a new route for engineering exotic lattice systems and exploring topological dissipation. Using the spatial lattice of atomic spin waves 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 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.
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title Topological Atomic Spin Wave Lattices by Dissipative Couplings
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