Contact Information
Office 39, Computing Applications Building
605 E Springfield Ave
Champaign, IL 61820
Biography
I grew up in Vienna, Austria. After studying Mathematics and Physics at the University of Vienna from 2006-2013, I obtained my PhD in Mathematics from the University of Cambridge in 2017. I was a Postdoctoral Research Associate at JILA, University of Colorado Boulder from 2016-2019, and a Joint Postdoctoral Fellow at the Institute for Quantum Computing, University of Waterloo and the Perimeter Institute for Theoretical Physics from 2019-2020. In January 2021 I joined the Department of Mathematics at UIUC as an Assistant Professor. My research focuses on quantum information theory.
Research Interests
Mathematical and computational aspects of quantum information theory
Research Description
I study mathematical and computational aspects of quantum information theory. In particular, I am interested in the following topics:
- Quantum channels and their various capacities
- Additivity problems
- Multipartite entanglement
- Stabilizer formalism, in particular graph states
- Teleportation protocols
- Entropic quantities and their properties (see my PhD thesis)
- Second order asymptotics
- Classical and quantum network information theory
To study these topics, I use tools from representation theory and group theory, matrix analysis, convex optimization (in particular semidefinite programming), global optimization, and machine learning.
Education
PhD, University of Cambridge, 2017
Awards and Honors
NSF CAREER award, National Science Foundation, 2025
Lincoln Excellence for Assistant Professor (LEAP) Scholar, University of Illinois Urbana-Champaign, 2023-2025
Arnold O. Beckman Research Award, University of Illinois Urbana-Champaign, 2023-2025
David H. Blackwell Scholar, Department of Mathematics, University of Illinois Urbana-Champaign, 2023-2025
Smith-Knight and Rayleigh-Knight Prize (essay), University of Cambridge, 2015
Recent Publications
- Christandl, M., Leditzky, F., Majenz, C., Smith, G., Speelman, F., Walter, M. (2020). Asymptotic Performance of Port-based Teleportation. Communications in Mathematical Physics. https://doi.org/10.1007/s00220-020-03884-0, arXiv:1809.10751
- Leditzky, F., Alhejji, M., Levin, J., Smith, G. (2020). Playing Games with Multiple Access Channels. Nature Communications 11, 1497. https://doi.org/10.1038/s41467-020-15240-w, arXiv:1909.02479
- Bausch, J., Leditzky, F. (2020). Quantum Codes from Neural Networks. New Journal of Physics 22, 023005. https://doi.org/10.1088/1367-2630/ab6cdd, arXiv:1806.08781