151197 20251017144624.0 doi 10.1515/nanoph-2024-0568 sideral 143021 ART-2025-143021 eng Román-Roche, Juan Universidad de Zaragoza (orcid)0000-0003-2995-6615 Bound polariton states in the Dicke–Ising model 2025 Access copy available to the general public Unrestricted We present a study of hybrid light–matter excitations in cavity QED materials using the Dicke–Ising model as a theoretical framework. Leveraging linear response theory, we derive the exact excitations of the system in the thermodynamic limit. Our results demonstrate that the cavity can localize spin excitations, leading to the formation of bound polaritons, where the cavity acts as an impurity of the two-excitation band, localizing spin-wave pairs around single-spin domains. We derive the condition for the existence of these bound states and discuss its satisfiability in different regimes. Finally, we show that these effects persist in finite systems using exact-diagonalization calculations. info:eu-repo/grantAgreement/ES/AEI/CEX2023-001286-S info:eu-repo/grantAgreement/ES/DGA/E09-17R-Q-MAD info:eu-repo/grantAgreement/ES/MCIU/FPU20-07231 info:eu-repo/grantAgreement/EUR/MICINN/TED2021-131447B-C21 info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Gómez-León, Álvaro Luis, Fernando (orcid)0000-0001-6284-0521 Zueco, David (orcid)0000-0003-4478-1948 2004 405 Universidad de Zaragoza Dpto. Física Teórica Área Física Teórica (2025), [12 pp.] Nanophotonics Nanophotonics 2192-8606 1598056 http://zaguan.unizar.es/record/151197/files/texto_completo.pdf Versión publicada 3020669 http://zaguan.unizar.es/record/151197/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:151197 articulos driver 2025-10-17-14:23:05 ARTICLE