Manipulating Core-Excitations in Molecules by X-ray Cavities

TL;DR

This paper explores how placing molecules in X-ray cavities can couple localized core-excitations into delocalized core-polaritons, affecting various spectroscopic signals.

Contribution

It introduces a novel method to manipulate core-excitations in molecules using X-ray cavities, demonstrating the formation of core-polaritons in specific molecules.

Findings

Predicted signatures of core-polaritons in X-ray absorption spectra

Demonstrated coupling of core-excitations via cavity photons

Proposed new spectroscopic techniques to observe these effects

Abstract

Core-excitations on different atoms are highly localized and therefore decoupled. By placing molecules in an X-ray cavity the core-transitions become coupled via the exchange of cavity photons and form delocalized hybrid light-matter excitations known as core-polaritons. We demonstrate these effects for the two inequivalent carbon atoms in 1,1-difluoroethylene. Polariton signatures in the X-ray absorption, two-photon absorption, and multidimensional four-wave mixing, signals are predicted.