%0 Journal Article
%A Wang, shuxin
%A Zhao, Zijian
%A Wang, Xiaoyang
%A Li, Tianyi
%A Su, Yang
%A Uemura, Yohei
%A Lima, F. Alves
%A Khadiev, A.
%A Wang, Bihan
%A Ablett, James
%A Rueff, J-P.
%A Wang, Hongchang
%A Fox, Joachim
%A LI, WEIBIN
%A Zhu, Linfan
%A Huang, Xinchao
%T Cavity Controls Core-to-Core Resonant Inelastic X-Ray Scattering
%J Physical review letters
%V 136
%N 6
%@ 0031-9007
%C College Park, Md.
%I APS
%M PUBDB-2026-00712
%P 063601
%D 2026
%X X-ray cavity quantum optics with inner-shell transitions has been limited by the spectral overlap between resonant and continuum states. Here, we report the first experimental demonstration of cavity-controlled core-to-core resonant inelastic x-ray scattering (RIXS). We suppress the absorption-edge effects by monitoring the RIXS profile, thereby resolving the resonant state from the overlapping continuum. We observe distinct cavity-induced energy shifts and cavity-enhanced decay rates in the 2⁢𝑝⁢3⁢𝑑RIXS spectra of WSi<sub>2</sub>. These effects, manifesting as stretched or shifted profiles in the RIXS planes, enable novel spectroscopic applications via cavity-controlled core-hole states. Our results establish core-to-core RIXS as a powerful tool to manipulate inner-shell dynamics in x-ray cavities, offering new avenues for integrating quantum optical effects with x-ray spectroscopy. 
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1103/z6xz-p7cm
%U https://bib-pubdb1.desy.de/record/646072