Shaul mukamel irvine

ABSTRACT

Novel X-ray pulse sources from free-electron lasers and high-harmonic generation setups enable the monitoring of molecular events on unprecedented temporal, spatial and energetic scales. The attosecond duration of X-ray pulses, their large bandwidth, tunable energy range, and the atomic selectivity of core X-ray excitations offer a uniquely high spatial and temporal selectivity for non linear spectroscopies. Recent developments in the design of X-ray spectroscopic signals reveal detailed information about the ultrafast passage through conical intersections. We show how the orbital angular momentum of twisted X-ray light can be leveraged to detect electronic and vibrational coherences and time evolving chirality emerging at conical intersections due to the bifurcation of molecular wavepackets. Multidimensional spectroscopy has been instrumental for probing dynamical processes in a wide variety of material systems ranging from atoms, molecules to biological complexes. These techniques traditionally rely on sequences of coherent laser pulses with electric fields with well d

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