Spatial and temporal dynamics of matter in intense laser fields

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This project aims at providing a better understanding of the non-perturbative interactionof matter with laser pulses or external fields. In each of the three project groups, theunderstanding of the nonlinear quantum dynamics will be advanced primarily with theaid of computer simulations to allow for spatial and temporal resolution. It is also an aimof the research to explore new concepts and tools that could stimulate furthertheoretical and experimental interest.The first sequence of projects focuses on new phenomena that occur if laser fields aresufficiently intense either to trigger or affect the creation of electron-positron pairs fromvacuum. The studies will build on a computational technique that has been developedby the PIs to solve the quantum field theoretical equations in space-time. The secondsequence of projects examines the spatially resolved electron-photon-electroninteraction and searches for the origin of the Coulomb force. It is based on a non-unitaryquantum mechanical formalism that allows the computation to be carried out. The thirdsequence of projects explores theoretically as well as experimentally the propagation oflaser fields through heterogeneous dielectric random media.