I am a PhD-student at the Department of Mathematics of Saarland University under the supervision of Moritz Weber. Before that I was a master’s student at TU Darmstadt.

My research interests are quantum graphs, compact quantum groups and their applications in quantum information theory. Besides that, I am also interested in graph C*-algebras and their generalizations to hypergraphs or quantum graphs.

You can contact me via bschaefer[at]math.uni-sb.de. See also [Orcid], [Arxiv], [LinkedIn].

News

• From March 1 to March 14, 2026, I will take part in the program on Operator Algebras and Quantum Information at Institut Mittag-Leffler.
  [Feb 25, 2026]
• A new preprint with Mariusz Tobolski on “Voltage quantum graphs and a Gross-Tucker theorem for quantum graphs” can be found on the Arxiv [link].
  [Feb 25, 2026]
• I vibe-coded a PDF editor GradeFrame to mark exercise sheets from students. Comments and contributions on GitHub are very welcome!
  [Feb 25, 2026]