Robert Harlander

Institute for Theoretical Particle Physics and Cosmology
Faculty of Mathematics, Computer Science and Natural Sciences
RWTH Aachen University
52056 Aachen, Germany
phone: +49-241-80-27045
fax: +49-241-80-22187
Office: 28A414, Campus Melaten

– Home –

Brief CV









LHC and Philosophy



Bachelor Topics for summer term 2021

The deadline for application has passed. New topics will be announce in early 2022.

Click on the titles to see more details.
Low-energy theorems in field theory

Low-energy theorems facilitate calculations in quantum field theory. In this project, you will verify this with concrete cases from particle physics.

The student will learn:

  • Basic concepts from quantum field theory.
  • Its application in practical calculations.


  • Affinity to mathematics and theoretical physics.

Asymptotic expansions and the Gradient Flow

The gradient flow formalism has been suggested in 2010 to facilitate practical calculations in Lattice QCD. It has proven to be accessible also in perturbation theory and provides a promising link between the two approaches to strong interactions. In this project, you are going to develop means to calculate the resulting Feynman integrals in a systematic way.

The student will learn:

  • The general method of the gradient flow.
  • Approaches to calculating non-standard Feynman integrals.


  • Affinity to mathematics and theoretical physics.

Feynman diagrams as a parlor game

Feynman diagrams provide a very algorithmic way to generate and represent processes in particle physics. In this project, you will devise a generalization of the parlor game Scrabble to Feynman diagrams.

The student will learn:

  • The algorithmic structure of Feynman diagrams.


  • Interest in Feynman diagrams.
  • Affinity to computer programming.

The reality of virtual particles

Virtual particles are an essential component in the perturbative theoretical description of particle physics. In this project, you will study and compare various viewpoints on the virtual particle concept.

The student will learn:

  • Basic concepts of quantum field theory.
  • The critical assessment of interpretations of quantum physics.


  • Interest in particle physics and the history and philosophy of physics.

Epidemiological models from a physicist's perspective

Metrics for the SARS-CoV-2 virus are about as pervasive as the virus itself. Where do they come from, and how reliable and statistically significant are they? The models used to estimate the impact of various measures are not too different from various evolution models in physics. In this project, you are going to study the most popular ones among them, and investigate the correlations between the corresponding statistical uncertainties.

The student will learn

  • to acquire expertise on a novel topic.


  • Basic programming skills.
  • Basic knowledge of statistics.

last updated on May 22, 2021 by RH