Abstract
Superradiant phase transitions are fundamental phenomena in light-matter coupled systems. Here, we uncover a novel class of superradiant criticality that is topologically distinct from previously known superradiant transitions. Using cavity-mediated cluster-Ising chains as an illustrative example, we numerically demonstrate that the critical line separating the superradiant phase from the cavity topological phase hosts robust symmetry-protected edge degeneracies, a feature absent in conventional superradiant transitions. Remarkably, although its local bulk critical properties are indistinguishable from those of the previously identified topologically trivial superradiant transition, the two criticalities cannot be smoothly connected without breaking the protecting symmetries or passing through a multicritical point. We further show that such topological superradiant criticality is generic, also occurring in cavity-mediated $\mathbb{Z}_{n}^{}$ cluster-qudit chains, as supported by complementary lattice simulations.
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Publication details
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- Open access
- Green open access
Cite this article
APA 7
Liu, Y., Yang, S., Chen, M., & Yu, X. J. (2026). Topological Superradiant Universality Classes in Cavity-Mediated Spin Chains. https://omanscience.com/en/articles/topological-superradiant-universality-classes-in-cavity-mediated-spin-chains
MLA 9
Liu, Yunhao, et al. "Topological Superradiant Universality Classes in Cavity-Mediated Spin Chains." https://omanscience.com/en/articles/topological-superradiant-universality-classes-in-cavity-mediated-spin-chains.
Chicago (author–date)
Liu, Yunhao, Sheng Yang, Mingyuan Chen, and Xue-Jia Yu. 2026. "Topological Superradiant Universality Classes in Cavity-Mediated Spin Chains." https://omanscience.com/en/articles/topological-superradiant-universality-classes-in-cavity-mediated-spin-chains.
Harvard
Liu, Y., Yang, S., Chen, M. and Yu, X. J. (2026) 'Topological Superradiant Universality Classes in Cavity-Mediated Spin Chains', Available at: https://omanscience.com/en/articles/topological-superradiant-universality-classes-in-cavity-mediated-spin-chains.
Vancouver
Liu Y, Yang S, Chen M, Yu XJ. Topological Superradiant Universality Classes in Cavity-Mediated Spin Chains. https://omanscience.com/en/articles/topological-superradiant-universality-classes-in-cavity-mediated-spin-chains
IEEE
Y. Liu, S. Yang, M. Chen, and X. J. Yu, "Topological Superradiant Universality Classes in Cavity-Mediated Spin Chains," https://omanscience.com/en/articles/topological-superradiant-universality-classes-in-cavity-mediated-spin-chains.