Preprint—not peer reviewed
Uni-XAS: Alignment-Driven Bidirectional Multimodal Learning for X-ray Absorption Spectroscopy
Uni-XAS treats spectra and atomic structures as a shared alignment-and-generation problem, with retrieval-anchored forward decoding and permutation-rectified inverse flow matching. The authors report strong cross-modal retrieval, absolute-spectrum prediction, and composition-conditioned three-dimensional structure generation on 328,839 paired structures and spectra. A common latent space makes forward and inverse spectroscopy mutually informative rather than two disconnected regressions.