Below I have collected notes or slides of some selected talks I have given.
Talks in 2023
- The stringor bundle
Conference "Geometries from Strings and Fields", Galileo Galilei Institute, July 2023
Video - The stringor bundle
Workshop "Geometric/Topological Quantum Field Theories and Cobordisms", New York University Abu Dhabi, March 2023
Presentation
Talks in 2022
- Transgression of higher structures to loop spaces
Workshop "Loop Space and Higher Category", online, December 2022
Presentation - A representation of the string 2-group
TQFT Club Seminar, online, November 2022
Video Presentation - Geometric T-Duality: Buscher rules in general topology
Program "Higher Structures and Field Theory", Erwin-Schrödinger-Institut für Mathematische Physik, August 2022
Video - Diffeology as an extension of topology by geometry
Seminar on diffeology and related topics, online, June 2022
Notes
Talks in 2021
- String geometry
Seminar "Renormalisation and Geometry", Universität Potsdam, June 2021
Video
Talks in 2020
- An introduction to higher parallel transport
Seminar "Algebraic and combinatorial perspectives in the mathematical sciences", online, September 2020
Presentation Video - 2-vector bundles, with applications to twisted K-theory and spin geometry
Program "Higher Structures and Field Theory", Erwin-Schrödinger-Institut für Mathematische Physik, August 2020
Notes
Talks in 2019
- Functorial Field Theories and Spin Geometry
Mathematics Colloquium Series, New York University Abu Dhabi, November 2019
Notes - Stacks, Gerbes, and T-Duality
Seminar "Differential Geometry", University of Adelaide, February 2019
Notes
Talks in 2018
- Fusion in loop spaces
Workshop "Geometric Quantization", Banff International Research Station for Mathematical Innovation and Discovery, April 2018
Video - Non-geometric T-duals and non-abelian gerbes
Workshop "Quantum Spacetime '18", III. Annual workshop of the COST Action MP1405 "Quantum Structure of Spacetime", Best Western Hotel Expo, Sofia, February 2018
Notes
Talks in 2017
- String connections and loop spaces
Workshop "Loop spaces, supersymmetry and index theory", Nankai University at Tianjin, July 2017
Presentation
Talks in 2016
- String geometry and spin geometry on loop spaces
Parallel session "Mathematical aspects of string theory and string geometry", Conference ''Classical and quantum symmetries in mathematics and physics'', Friedrich-Schiller-Universität Jena, July 2016
Notes - Transgressive central extensions of loop groups
Conference "Colloquium on Algebras and Representations - Quantum 2016", Universidad Nacional de Córdoba, March 2016
Notes
Talks in 2015
- String structures and supersymmetric sigma models
Program "Higher structures in string theory and quantum field theory", Erwin-Schrödinger-Institut für Mathematische Physik, December 2015
Notes
Talks in 2014
- Differential string classes and loop spaces
Workshop "Differential Cohomologies", The Graduate Center, CUNY, August 2014
Notes Video - Loop group geometry and transgression
47. Seminar Sophus Lie, Schloss Rauischholzhausen, May 2014
Notes
Talks in 2013
- Unendlich-Kategorien und Quantenfeldtheorie
Weihnachtskolloquium, Universität Greifswald, December 2013
Presentation - Lectures on gerbes, loop spaces, and Chern-Simons theory
Workshop "Chern-Simons Theory: Geometry, Topology and Physics", University of Pittsburgh, May 2013
Notes - Lectures on gerbes with connection
Workshop "Topological Aspects of Quantum Field Theories", National University of Singapore, January 2013
Notes
Talks in 2011
- A loop space formulation for the geometry of abelian gerbes
Conference "Analysis, Geometry, and Quantum Field Theory", Universität Potsdam, October 2011
Notes - Geometric string structures and supersymmetric sigma models
Workshop "Higher Gauge Theory, TQFTs, and Categorification", Cardiff University, May 2011
Notes - Abelian gauge theories on loop spaces and their regression
Workshop "Higher Gauge Theory, TQFT and Quantum Gravity", Instituto Superior Técnico Lisboa, February 2011
Notes
Talks in 2010
- Global Gauge Anomalies in two-dimensional Bosonic Sigma Models
Workshop "Geometry, Quantum Fields, and Strings: Categorial Aspects", Mathematisches Forschungsinstitut Oberwolfach, June 2010
Notes - Transgression of Gerbes to Loop Spaces
Workshop "Higher Structures in Topology and Geometry IV", Georg-August-Universität Göttingen, June 2010
Notes - Chern-Simons Theory and the Categorified Group Ring
Workshop "Twisted K-Theory and Loop Groups", Talbot 2010 workshop, Breckenridge, Colorado, May 2010
Notes
Talks in 2009
- String Connections and Supersymmetric Sigma Models
Workshop "Homotopy theory and higher algebraic structures", Special Section at AMS Western Section meeting, University of California at Riverside, November 2009
Notes - Multiplicative Gerbes and Chern-Simons Theory
Seminar "Topologie", Universität Bonn, October 2009
Notes - String Connections and Chern-Simons 2-Gerbes
Workshop "Strings, Fields and Topology", Mathematisches Forschungsinstitut Oberwolfach, June 2009
Notes - Smooth Functors for higher-dimensional Parallel Transport
Workshop "Smooth Structures in Logic, Category Theory and Physics", Ottawa University, May 2009
Notes
Talks in 2008
- Transport Functors and Connections on Gerbes
Seminar "Topology", University of California at Berkeley, August 2008
Notes Part 1 Notes Part 2 - Geometry for 2-Form Gauge Fields
Conference "Tagung des Sonderforschungsbereichs Particles, Strings and the Early Universe", Deutsches Elektronen-Synchrotron DESY Zeuthen, February 2008
Notes
Talks in 2007
- Parallel Transport and Functors
Conference "Categories in Geometry and mathematical Physics", Mediterranean Institute For Life Sciences, September 2007
Notes - Parallel Transport Functors of Principal Bundles and (non-abelian) Bundle Gerbes
Conference "Principal Bundles, Gerbes and Stacks", VBAC-Meeting, Physikzentrum Bad Honnef, June 2007
Notes
Talks in 2006
- Gerbes in unoriented WZW-Models
Summer school "Modern Mathematical Physics IV", University of Belgrade, September 2006
Notes
Talks in 2005
- Introduction to Gerbes in Conformal Field Theory
Workshop "Gerbes, twisted K-theory and conformal field theory", Mathematisches Forschungsinstitut Oberwolfach, August 2005
Notes - Einführung in die perturbative Quantisierung von Chern-Simons-Theorien
Seminar "Geometrische Aspekte der konformen Feldtheorie", Rerik, February 2005
Notes