In project S02, we will investigate the possibility of directly controlling electrons in solids with electric fields of intense laser pulses, which opens up routes for developing lightwave-driven electronics at petahertz rates. Progress along this route requires the understanding of intense laser-solid interactions on sub-cycle time-scale. We will  use of the valley degree of freedom of crystals and the electronic coherence to perform elementary operations at the few-femtosecond time scale. We will apply the highly nonlinear optical response and machine learning to write and read-out the information in solids and to resolve electron dynamics on sub-femtosecond and sub-angstrom scale.