Gönenç Moğol

We present momentum resolved covariance measurements of entangled electronic-nuclear wave packets created and probed with octave spanning phaselocked ultrafast pulses. We launch vibrational wave packets on multiple electronic states via multiphoton absorption, and probe these wave packets via strong field double ionization using a second phaselocked pulse.

Abstract We extend covariance velocity map ion imaging to four particles, establishing cumulant mapping and allowing for measurements that provide insights usually associated with coincidence detection, but at much higher count rates. Without correction, a fourfold covariance analysis is contaminated by the pairwise correlations of uncorrelated events, but we have addressed this with the calculation of a full cumulant, which subtracts pairwise correlations.

Velocity map imaging (VMI) of electrons and ions has played a very important role in time resolved spectroscopy and strong field light–matter interactions.1–51. A. Zhao, M. van Beuzekom, B. Bouwens, D. Byelov, I. Chakaberia, C. Cheng, E. Maddox, A. Nomerotski, P. Svihra, J. Visser, V. Vrba, and T. Weinacht, “Coincidence velocity map imaging using Tpx3Cam, a time stamping optical camera with 1.5 ns timing resolution,” Rev. Sci. Instrum. 88(11), 113104 (2017). https://doi.org/10.1063/1.49968882. D. W. Chandler and P.