“Multidimensional spectroscopy with attosecond pulses for quantum state tomography”

The gold standard in characterizing a quantum state is the reconstruction of its density matrix, and there has been a growing interest in applying these methods to photoelectron wavepackets. To this end, several quantum state tomography (QST) protocols have been proposed and applied to atomic gases. These use combinations of extreme ultraviolet (XUV) photons that are used to create the photoelectron, followed by infrared (IR) pulses used to measure it. The structure of the IR pulses determines the number of experiments and complexity of the retrieval algorithm that are needed to reconstruct the density matrix, as well as the intrinsic error incurred. In this talk I present QST sequences that rely on multidimensional methods to perform the density matrix reconstruction in a single time-delay scan between XUV and IR pulses. I will begin by introducing the fundamentals of multidimensional spectroscopy and how it is applied to photoionization experiments, followed by an evaluation of the protocols applied to He and Ar.

Participante: Dr. Daniel Finkelstein-Shapiro

Institución: Departamento de Fisicoquímica | Instituto de Química, UNAM

Fecha y hora: Este evento terminó el Miércoles, 12 de Febrero de 2025