arxiv.org/abs/2509.17085 Universal two-excitation scattering in two-dimensional subwavelength atomic arrays
Researchers use scattering theory to study two-excitation interactions in subwavelength atomic arrays. At critical points of the band structure, scattering becomes universal and photon-field processes are suppressed, isolating a unitary nonlinear channel between collective dark spin waves.
— via arXiv — Physics, Yidan Wang, Oriol Rubies-Bigorda, Valentin Walther, Susanne F. Yelin
