Advances in ultrashort-pulse technology have made it possible to generate
electromagnetic pulses with duration as short as few hundred
attoseconds. thus approaches the orbital period of a classical atomic
electron. This advance holds the promise to map out electronic dynamics
inside atoms in real time. It poses a considerable challenge to theory to
identify observables and novel information that can be accessed and mapped
out by attosecond pulses. We will discuss recent progress and open
questions with the help of a few examples. Topics include time-resolved
Fano resonances in atoms and quantum graphs, coherent
excitation, time-resolved orbital motion in doubly-excited helium, and
time-double slit interferences.
Work performed in collaboration with D. Arbo, I. Barna, A. Bärnthaler, M. Drescher, F. Krausz, E. Persson, S. Rotter, J. Wang, M. Wickenhauser
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