Direct and indirect methods to study attosecond timescale electron dynamics

The recent development of attosecond laser pulses through high-harmonic generation and their characterization using a variety of cross- and auto-correlation techniques has opened up the possibility to study electron dynamics in chemical and physical processes on their natural timescales. In this paper we review how electrons exposed to strong electric fields are at the basis of the generation of high-harmonics and may provide model systems for the application of attosecond laser pulses.

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