Strong field ionization momentum distribution contains much information. The angular distribution indicates real tunneling delay time, the center shows ellipticity dependent Coulomb effects, and the longitudinal momentum spread challenges the assumption of zero initial momentum.
We combine an attosecond beamline with a 3D momentum imaging spectrometer to achieve coincidence pump probe experiments with unprecedented attosecond time-resolution. Besides technical details, first coincidence and pump-probe experiments are presented.
Most game playing programs are based on heuristic game tree search: the nodes at distance t from the root are evaluated by a heuristic evaluation function, and these values are backed up to the root by minimaxing. Following an old investigation by Beal and Smith , we discuss depth-t search with randomised evaluation functions: the heuristic leaf… (More)