Attosecond science

In ultrafast laser science the emergence of attosecond laser pulses raises the prospect of studying electronic wavepacket motion on the natural timescales of this motion in nature, namely the atomic unit of time (1 a.u. = 24 attosec-onds = 0.024 femtoseconds) [1,2]. Attosecond science may have a profound impact on the way we understand photo-induced physical and chemical processes. 

P.B. Corkum, F. Krausz, Attosecond science. Nature Phys. 3, 381 (2007) ... 

Markus Drescher, Michael Hentschel, Reinhard Kienberger, Gabriel Tempea, Christian Spielmann, Georg A. Reider, Paul B. Corkum, Eerenc Krausz, X-ray Pulses Approaching the Attosecond Eron-tier. Science, 291 (2001), 1923-1927. 

Attosecond dynamics is now one of the most active fields in science [222, 476] (see also the introductory section of Ref. [499], which shows a concise list of the studies covering many phenomena and relevant studies). In particular, tracking electronic motions in chemical dynamics is a fundamentally important process. To monitor those electron wavepacket dynamics in an attosecond intense laser field [476], Bandrauk and his coworkers have developed the theory of attosecond-scale time-resolved photoelectron spectroscopy [499, 500], Photoionization dynamics of small molecules like has been studied so far, for which direct numerical integrations of the related (low-dimensional) time-dependent Schrodinger equations are possible. The photoelectron signals are extracted from those numerical solutions... 

Paul, P. M., E. S. Toma, P. Breger, G. Mullot, F. Auge, Ph. Balcou, H. G. Muller, and P. Agostini. 2001. Observation of a train of attosecond pulses from high harmonic generation. Science 292 1689-1692. 

M. Drescher, M. Hentschel, R. Kienberger, G. Teinpea, C. Spiehnann, G.A. Reider, RB. Corkiuu, F. Krausz X-ray pulses approaching the attosecond frontier. Science 291, 1923 (2001)... 

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