Data from Figs. 2, 3, 4

We use a 4-f AOM-based pulse shaper to create phase-stable, deep-UV pump and probe pulses with sub-10 attosecond relative timing control. This attosecond-precision pulse shaping allows us to resolve long-lived electronic coherences, modulated by nuclear dynamics, via interference between multiple ionization pathways.Data from Figure 2: The main dataset consists of the benzene ionization difference signal as a function of pump–probe delay, averaged over 5 runs. The difference signal is obtained by subtracting the out-of-phase data from the in-phase data.Data from Figure 3: Benzene ionization difference signal as a function of pump–probe delay for the case when the pump pulse has a pi phase shift across a portion of its spectrum. Tailoring the pump-pulse spectral phase results in a shift of the vibrational wave packet in the intermediate state as compared to the unshaped experiment.Data from Figure 4: Molecular: Benzene ionization yield as a function of the relative phase between the pump and probe pulses for both unshaped pulses and the case when we put two “notches” in the spectrum of the probe pulse at the positions of the primary benzene absorption peaks. For both cases, the relative phase between the pump and probe pulse is scanned at a fixed delay of 366.8 fs. Optical: To demonstrate that the measured signals arise from molecular interference, we present analogous optical measurements under these same conditions. The optical curves are generated by multiplying optical interference data and the benzene absorption spectrum and then integrating across wavelength.