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arXiv · 2508.07669

Topological quantum electrodynamics in synthetic non-Abelian gauge fields

Qinan Huang·Bengy T. T. Wong·Zehai Pang·Xudong Zhang·Zeling Chen·Yi Yang
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Abstract

Quantum electrodynamics (QED), a cornerstone framework that describes light-matter interactions rooted in Abelian symmetries, renders the harnessing of synthetic non-Abelian gauge fields as a fundamental yet uncharted frontier. Here, we develop a general theory of light-matter interaction of quantum emitters embedded in non-Abelian photonic lattices. Based on analytical solutions to the non-Abelian Landau dressed states beyond the continuum limit, we reveal chiral photon emission and vortices with emergent nonreciprocity enabled by selective coupling between emitters and spin-momentum-locked bands. When coexisting with Abelian and non-Abelian magnetic fields, emitters hybridize with Landau dressed orbits to form spin-polarized, squeezed Landau polaritons that carry quantized angular momenta, with Rabi frequencies tunable via Landau levels and pseudospin interactions. Multi-emitter dynamics further exhibit collective phenomena governed by real-space staggered phases induced by nonsymmorphic crystalline symmetry. These results bridge non-Abelian physics with quantum optics, and establish non-Abelian gauge fields as a versatile tool for synthesizing topological quantum optical states, angular momentum transfer, and controlling photon-mediated correlations in QED systems, relevant for applications in quantum simulations and chiral quantum optical networks.

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Qinan Huang, Bengy T. T. Wong, Zehai Pang, Xudong Zhang, Zeling Chen, Yi Yang. 2025-08-11. Topological quantum electrodynamics in synthetic non-Abelian gauge fields. https://doi.org/10.1103/8s89-cxp2

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