Fachbereich Mathematik 
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Lóránt Szegedy

Lóránt Szegedy


Department of Mathematics
Section Algebra and Number Theory
Bundesstraße 55 (Geomatikum)
20146 Hamburg

Tel.: +49 40 42838-5193
E-Mail: lorant.szegedy (at) uni-hamburg.de
If you can send your email encrypted. Here is my PGP Key.

Very Short Bio:

I am currently a postdoc at the University of Hamburg.

Before that I was a postdoctoral fellow at the Max Planck Institute for Mathematics in Bonn.

Before that I was a PhD student in mathematics of Ingo Runkel at the University of Hamburg and was funded by the Research Training Group 1670 "Mathematics Inspired by String Theory and QFT".

Even before that I was a MSc student in mathematical physics at the University of Hamburg and before that a BSc student in physics at the Budapest University of Technology.

You can find my detailed CV here.

Research Interests:

  • low dimensional quantum field theories
  • in particular: topological and conformal field theories
  • higher categories, defect bicategories of 2d QFTs
  • moduli spaces of (r-spin) surfaces, moduli spaces of flat connections on surfaces
  • fully extended topological field theories
You can find my research statement here.


  • On Invertible 2-dimensional Framed and r-Spin Topological Field Theories
  • Symmetry Defects and Orbifolds of Two-dimensional Yang-Mills Theory (with Lukas Müller and Richard J. Szabo)
  • Area-Dependent Quantum Field Theory with Defects (with Ingo Runkel)
  • Topological Field Theory on r-Spin Surfaces and the Arf Invariant (with Ingo Runkel)
  • An efficient linear-scaling CCSD(T) method based on local natural orbitals (with I. Ladjánszki, B. Ladóczki, M. Kállay, Z. Rolik)
    J. Chem. Phys. 139. 094105 (2013)

PhD Thesis

State-Sum Construction of Two-Dimensional Functorial Field Theories, 2018, University of Hamburg, available at: http://ediss.sub.uni-hamburg.de/volltexte/2018/9321/

Master's Thesis

Area Dependent Quantum Field Theories, 2015, University of Hamburg, available here

Organized Seminars and Events:

PhD Seminar WS2017 (together with Sebastian Heller)

PhD Seminar WS2016

RTG 1670 Alumni Event


Tutorials in "Mathematics I for Geophysics/Oceanology, Meteorology, Physics and Computing in Science students" (in German), University of Hamburg, Fall 2019

Tutorials in "Mathematics II for Geophysics/Oceanology, Meteorology, Physics and Computing in Science students" (in German), University of Hamburg, Summer 2019

Tutorials in Introductory Physics Course, Budapest University of Technology, 2012 Winter term

  Seitenanfang  Impress 2019-10-30, Lóránt Szegedy