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A list of all the posts and pages found on the site. For you robots out there, there is an XML version available for digesting as well.
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publications
Families of periodic delay orbits
Published in Journal of Differential Equations, 410, 228-250, 2024
Peter Albers, Philipp Aretz, Irene Seifert
DOI: 10.1016/j.jde.2024.07.021 | arXiv: 2304.07550
This paper provides examples of periodic solutions to a certain class of two dimensional differential delay equations. We further investigate geometric properties of the families of solutions.
Recommended citation: Albers, P., Aretz, P., and Seifert, I. (2024). "Families of periodic delay orbits." Journal of Differential Equations, 410, 228-250. https://doi.org/10.1016/j.jde.2024.07.021
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A rigorous Keldysh functional integral for fermions
Published in Journal of Statistical Physics, 193(2), Article 28, 2026
Philipp Benjamin Aretz, Manfred Salmhofer
DOI: 10.1007/s10955-026-03583-5 | arXiv: 2508.01787
We give a mathematically precise foundation for the Keldysh formalism and show that it produces stable, controlled predictions for non-equilibrium fermionic systems.
Recommended citation: Aretz, P. B. and Salmhofer, M. (2026). "A rigorous Keldysh functional integral for fermions." Journal of Statistical Physics, 193(2), 28. https://doi.org/10.1007/s10955-026-03583-5
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talks
Diffraction across Colliders
Published:
An expanded version of my conference talk for graduate students at MIT.
Diffraction across Colliders
Published:
Factorization of diffraction and universality across colliders.
teaching
Classical Mechanics (8.01)
Undergraduate course, MIT, Department of Physics, 2025
Grad TA for classical Mechanics (8.01) at MIT.