Twin Polaritons: Classical versus Quantum Features in Polaritonic Spectra

Author(s): Irén Simkó and Norah M. Hoffmann Understanding whether a polaritonic phenomenon is fundamentally quantum or classical is essential for building accurate theoretical models and guiding experimental design. Here, we address this question in the context of polaritonic spectra and report an intriguing new feature: the twin polariton, a… [Phys. Rev. Lett. 135, 233601] Published Mon Dec 01, 2025