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].

Preprints

• Classification of Certain C*-Algebras Generated by Two Partitions of Unity
  28 pp. [arxiv]
• Complete Classification of Directed Quantum Graphs on M2
  with Nina Kiefer, 42 pp. [arxiv]
• Nuclearity of Hypergraph C*-Algebras
  with Moritz Weber, 47 pp, to appear in Journal of Noncommutative Geometry. [arxiv]

Talks

• Hypergraph C*-Algebras. 20th Workshop: Noncommutative Probability, Operator Algebras and Related Topics, with Applications, Będlewo 2025. [slides]
• Two Partitions of Unity. YMC*A 2024, Glasgow. (lightning talk)
• Nuclearity of Hypergraph C*-Algebras. Arbre de Noël 2023, Metz. (contributed talk)
• Nuclearity of Hypergraph C*-Algebras. YMC*A 2023, KU Leuven. (contributed talk)