Abstract
Correlation function expressions for multidimensional photoelectron signals obtained for the response of electrons and nuclei in molecules to multiple ultrafast optical or x-ray pulses are derived using a superoperator formalism. For classical fields and quantum matter, these signals are recast as modulus squares of transition amplitudes which depend on the pulse bandshapes. A vibrational wave-packet representation which does not involve amplitudes is derived when the nuclear dynamics is calculated classically. In the case of a quantum radiation field, the signals depend on multipoint correlation functions of field operators. Photoelectron spectroscopy with entangled photons may be studied using this formalism.
- Received 26 November 2009
DOI:https://doi.org/10.1103/PhysRevA.81.063810
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