Unraveling Real-Time Chemical Shifts in the Ultrafast Regime - Rivas, Daniel E; Rivas, Daniel E; Paoloni, Lorenzo; Boll, Rebecca; De Fanis, Alberto; Gutierrez, Ana Martinez; Mazza, Tommaso; Oberli, Solene; Alexander, Oliver; Al-Haddad, Andre; Baumann, Thomas M; Baumann, Thomas M; et al. (Physical Review X, 2026)