Precision physics on bound single, few, and many strongly correlated electron systems in strong fields (B01)

• Subject Area: Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
• Term: since 2016
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 273811115

The central goal of this project is the precise determination of properties of highly charged ions. The focus is on electron binding energies and g-factors. The systems studied range from systems with a single electron where quantum electrodynamic (QED) corrections are important to systems with a few to several electrons where strong electron correlations become the leading source of corrections to energy levels. Theoretically we will calculate the electron binding energies using numerically exact solutions within a finite Hilbert space (RAS-CI). We will extend these methods by deriving renormalized interactions within the active space due to fluctuations into virtual states, thereby improving one of the most accurate methods available for few-electron systems.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1225: Isolated quantum systems and universality in extreme conditions (ISOQUANT)
• Applicant Institution: Ruprecht-Karls-Universität Heidelberg
• Project Heads: Professor Dr. Klaus Blaum; Professor Dr. José Ramón Crespo López-Urrutia, until 6/2020; Professor Dr. Maurits Haverkort; Dr. Sven Sturm; Professor Dr. Christof Wetterich, until 6/2020