October 31, 2024, at U Heidelberg Kenji Fukushima, Department of Physics, Tokyo University, Japan 1 month in October 2024 at U Heidelberg Bradley Meyer, Clemson University, USA 1 month in 2024 at GSI Davide [...] September 2025 to May 2026, at U Heidelberg 2024 Michael Wiescher, Department of Physics, University of Notre Dame, USA 4 months from February to May 2024 at GSI Navid Abbasi, Lanzhou University, China [...] China 6 months between January and July 2024 at GU Frankfurt Joannis Papavassiliou, Department of Theoretical Physics, U Valencia, Spain 0.5 month in June 2024 at U Heidelberg Takashi Nakamura, Tokyo Institute