Jörg Main

Jörg Main is a full Professor at the University of Stuttgart, leading the research group at the Institute for Theoretical Physics I. His work bridges condensed-matter theory, quantum optics, and nonlinear dynamics, with a strong emphasis on Rydberg excitons in cuprous oxide and the foundations of non-Hermitian quantum systems.

Research Interests:

• Exciton Physics & Semiconductor Spectroscopy: Extensive studies of Rydberg excitons in cuprous oxide, including quantum-defect theory, oscillator strengths, and fine-structure effects.
• Quantum Chaos & Semiclassical Methods: Application of periodic-orbit theory and phase-space analysis to understand complex spectra and classical-quantum correspondence.
• Non-Hermitian & PT-Symmetric Systems: Investigation of exceptional points, resonance phenomena, and gain-loss balanced potentials in Bose-Einstein condensates and photonic structures.
• Machine Learning in Physics: Development of Gaussian-process and neural-network approaches for predicting quantum dynamics and locating exceptional points in high-dimensional spectra.

Recent Publication Trends: Over the last two years, Prof. Main has published prolifically on cuprous oxide excitons, unveiling new quantum-well phenomena, resonance linewidth behavior, and semiclassical descriptions. A parallel thrust leverages machine-learning techniques to analyze complex spectra and time-dependent systems, demonstrating an innovative blend of theoretical physics and data science.

Laboratory & Group: Professor Main heads the Theory Group at the Institute for Theoretical Physics I, fostering an environment for advanced analytical and computational research in quantum many-body physics.