Sascha Lill

Doktorand / PhD Student

$fotoLill$ Kontakt / Contact Information


Sascha Lill
Universität Tübingen

Fachbereich Mathematik
AB Mathematische Physik
Auf der Morgenstelle 10
72076 Tübingen

Raum: C4 P42

Tel: +49 (0)7071 29 78448 (currently inactive)
E-Mail: sascha.lill@uni-tuebingen.de

Here is my CV.

Here is my arXiv list.

From April 2021 through September 2021, I am at Cergy-Potnoise (France) for a research visit with Michal Wrochna

From October 2021 through June 2022, I am it BCAM Bilbao (Spain) with Jean-Bernard Bru. See also my web site at BCAM

Wissenschaftliche Veröffentlichungen / Scientific Publications

Another Proof of Born's Rule on Arbitrary Cauchy Surfaces (2021), preprint, arXiv: https://arxiv.org/abs/2104.13861

Extended State Space for describing renormalized Fock spaces in QFT (2020), preprint, arXiv: https://arxiv.org/abs/2012.12608

Consistency Proof for Multi-Time Schrödinger Equations with Particle Creation and Ultraviolet Cut-Off (2020), https://doi.org/10.1007/s00023-020-01009-w, arXiv: https://arxiv.org/abs/2001.05920

Lehre / Teaching

WiSe 2018/19:

Übungsleiter / Tutor: Analysis 2 (bei Prof. Tumulka)
Math Hour

SoSe 2019:

Math Hour

SoSe 2020:

Übungsleiter / Tutor: Analysis 1 (bei Prof. Kröncke)

Übungsleiter / Tutor: Lineare Algebra 1 (bei Prof. Tumulka)

WiSe 2020/21:

Übungsleiter / Tutor: Geometrie (bei Prof. Paravicini)

Outreach

Link to the book project "Serlo", where I contributed in translating:

Real Analysis

Linear Algebra (under construction)

Measure Theory

Originale Deutsche Version der Serlo-Bücher:

Analysis 1

Lineare Algebra 1 (in Bearbeitung)

Maßtheorie

175 Impulse Projekt der jDPG (junge Deutsche Physikalische Gesellschaft) - ein Gemeinschaftsprojekt, in denen einige der Zeichnungen von mir stammen.

Forschungsinteressen / Research Interests

Mathematical methods in Quantum Field Theory (QFT)
Mathematical methods in Quantum Optics
perturbative and non-perturbative renormalization in QFT
Detector modeling
Multi-Time Wave functions

Forschung / Current Research

I am about to learn, where UV- and IR- divergences appear in QFT and Quantum Optics and how they can be circumvented.

I am currently investigating renormalization and time dynamics in different models for photon detectors (Absorbing Boundary Conditions and the Spin-Boson model).

I intend a comparison between the newly developed non-perturbative IBC-renormalization and the perturbative Epstein-Glaser renormalization.