Chirality-induced emergent spin-orbit coupling in topological atomic lattices

• URL: http://arxiv.org/abs/2311.09303v1
• Date: Wed, 15 Nov 2023 19:00:13 GMT
• Title: Chirality-induced emergent spin-orbit coupling in topological atomic lattices
• Authors: Jonah S. Peter, Stefan Ostermann, and Susanne F. Yelin
• Abstract summary: We show that photonic excitations in pseudospin-1/2 atomic lattices exhibit an emergent spin-orbit coupling when the geometry is chiral. Our results demonstrate that chiral atom arrays are a robust platform for realizing spin-orbit coupled topological states of matter.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Spin-orbit coupled dynamics are of fundamental interest in both quantum optical and condensed matter systems alike. In this work, we show that photonic excitations in pseudospin-1/2 atomic lattices exhibit an emergent spin-orbit coupling when the geometry is chiral. This spin-orbit coupling arises naturally from the electric dipole interaction between the lattice sites and leads to spin polarized excitation transport. Using a general quantum optical model, we determine analytically the conditions that give rise to spin-orbit coupling and characterize the behavior under various symmetry transformations. We show that chirality-induced spin textures are associated with a topologically nontrivial Zak phase that characterizes the chiral setup. Our results demonstrate that chiral atom arrays are a robust platform for realizing spin-orbit coupled topological states of matter.

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