Information Dynamics of Strongly-Interacting Bosons

• Applicant: Professor Dr. Christof Weitenberg
• Subject Area: Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas ; Theoretical Condensed Matter Physics
• Term: since 2026
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 550495627

The project studies information dynamics of strongly-interacting bosonic systems. Itinerant bosonic systems are of great interest but hard to tackle due to the large number of modes. We will use cutting-edge methods in theory and experiment to advance the understanding of these systems. On the theory side, we will utilize neural quantum states adapted to the description of itinerant bosons. On the experimental side, we will use ultracold bosonic atoms with quantum gas imaging in continuous one-dimensional and two-dimensional systems. In a joint effort, we will investigate the correlation spreading in such continuous systems in the absence of Lieb-Robinson bounds as well as thermalization of Bose gases over the dimensional crossover. We will also apply the numerical tools to study superconducting transmon circuits as a second paradigmatic bosonic system and investigate the role of many-body quantum chaos for quantum logical operations.

• DFG Programme: Research Units
• Subproject of: FOR 5919: Machine learning for complex quantum states
• International Connection: Switzerland
• Partner Organisation: Schweizerischer Nationalfonds (SNF)
• Co-Investigators: Professor Dr. Martin Gärttner; Dr. Markus Schmitt; Professor Dr. Simon Trebst
• Cooperation Partner: Professor Dr. Giuseppe Carleo