Cavity Controls Core-to-Core Resonant Inelastic X-ray Scattering

Abstract

X-ray cavity quantum optics with inner-shell transitions has been hindered by the overlap between resonant and continuum states. Here, we report the first experimental demonstration of cavity-controlled co-to-core resonant inelastic x-ray scattering (RIXS). We eliminate the effects of the absorption edge 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 rate in the $2p3d$ RIXS spectra of WSi${}_2$. These effects, manifesting as stretched or shifted profiles in the RIXS planes, enable novel spectroscopic applications by cavity-controlled core-hole states. Our results establish core-to-core RIXS as a powerful tool for manipulating inner-shell dynamics in x-ray cavities, offering new avenues for integrating quanutm optical effects with x-ray spectroscopy.

12 pages, 13 figures

References in corpus (13)

• Circuit Quantum Electrodynamics
• Resonant Inelastic X-ray Scattering Studies of Elementary Excitations
• Vacuum-assisted generation and control of atomic coherences at x-ray energies
• Interferometric phase detection at x-ray energies via Fano resonance control
• Tunable sub-luminal propagation of narrowband x-ray pulses
• X-ray quantum optics with Mössbauer nuclei embedded in thin film cavities
• Stopping narrow-band x-ray pulses in nuclear media
• Collective effects between multiple nuclear ensembles in an x-ray cavity-QED setup
• Ab initio quantum models for thin-film x-ray cavity QED
• Green function formalism for resonant interaction of x-rays with nuclei in structured media
• Manipulating Core-Excitations in Molecules by X-ray Cavities
• Controlling core-hole lifetime through an x-ray planar cavity
• High-resolution resonant inelastic X-ray scattering study of W-L3 edge in WSi2