Few-atom systems as simulators for attosecond physics (A06)

• Subject Area: Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas
• Term: from 2015 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 170620586

Project studies strong-field ionization processes in artificial atoms built from a few ultra-cold Fermions in a small optical dipole trap. This model system allows for a new approach to study the time-evolution of correlations among the electrons in an atom, because the density and momentum distribution can be directly imaged. The ionizing driving field will be simulated via modulated magnetic field gradients. The much slower time scales in the model system compared to real atoms allow for a new degree of control of the driving field, e.g. realizing true single cycle pulses. In collaboration with theory groups and in exchange with the experimental groups, we will investigate the role of the strength and range of interactions in correlated processes such as non-sequential double ionization and Auger decay after inner shell ionization. Furthermore, we will create artificial molecules such as benzene and study the transfer of electronic excitations between different atoms of the molecule.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 925: Light Induced Dynamics and Control of Correlated Quantum Systems
• Major Instrumentation: Lasersystem
• Instrumentation Group: 5700 Festkörper-Laser
• Applicant Institution: Universität Hamburg
• Project Head: Dr. Christof Weitenberg