Interference structures 16 Atoms 8 Diffraction 8 Coherent superpositions 6 Fast atom diffractions 6 Interference patterns 6 Ionization 6 Photo-electron emission 6 Surface analysis 6 Atomic beams 4 Collision systems 4 Color 4 Coulomb blockade 4 Coulomb potential 4 Electric fields 4 Emission spectroscopy 4 Initial value representation 4 Ionization potential 4 Laser pulses 4 Photoionization 4 Quantum theory 4 Strong-field approximations 4 Sub-cycle 4 Trajectories 4 Above-threshold ionization 2 Analytic expressions 2 Analytical expressions 2 Angular momentum distribution 2 Atomic ionization 2 Atomic spectroscopy 2