# Conference talks

## Invited Talks at Workshops and Conferences

- 03/2024
**Higher Categorical Tools for Quantum Phases of Matter**, Perimeter Institute, Waterloo, Ontario, Canada,

**Quantum double models and Dijkgraaf-Witten TQFT with defects** - 02/2024
**Plenary Talk, ANZAMP Meeting 2024**, Katoomba, Australia,

**Defects in Turaev-Viro state sums and Kitaev’s lattice model** - 10/2023
**Topological Quantum Computation**, ICMS, Edinburgh, UK,

**Turaev-Viro state sums with defects** - 08/2023
**Categorical Symmetries in Quantum Field Theories**,

Simons Collaboration on Global Categorical Symmetries, Les Diablerets, Switzerland

**Turaev-Viro-Barrett-Westbury state sums****with defects** - 08/2023
**Higher Structures in Functorial Field Theory**, CRC 1085, Regensburg

**Turaev-Viro-Barrett-Westbury state sums****with defects** - 03/2023
**Interactions between Poisson Geometry and Quantisation**Lecture series on

**TQFTs with defects** - 03/2022
**Main lecture, DPG spring meeting 2022**,

**State sum models with defects** - 09/2021
**Corfu Summer Institute: Workshop on Quantum geometry, Field theory and Gravity**

**3d state sum models with defects** - 08/2021
**GEOQUANT 2021**,

**Turaev-Viro state sums with defects** - 02/2021
**Women at the Intersection of Mathematics and Physics**, Perimeter Institute for Theoretical Physics,

**State sum models with defects** - 11/2019
**Emmy Noether Workshop: the structure of quantum spacetime**,

Perimeter Institute for Theoretical Physics

**Ideal tetrahedra and their duals** - 09/2019
**Women in Geometry and Topology**,

**Plenary Talk**, CRM, Barcelona

**Ideal tetrahedra and their duals** - 06/2019
**Defects in Topological and Conformal Field Theory**King’s College, London

**Mapping class group actions in Kitaev lattice models** - 04/2019
**Bayrischzell Workshop 2019**

Bayrischzell

**Mapping class group actions on quantised connections** - 07/2018
**Gauge theories and applications**

University of Regensburg

**Graph Gauge theories with Hopf algebras** - 07/2018
**3rd Bavarian Geometry and Topology Meeting**,

University of Regensburg

**Ideal tetrahedra and their Duals in 3d geometry** - 07/2018
**12th International ICMAT Summer School**

on Geometry, Mechanics and Control

Santiago de Compostela

**Lecture Series on Poisson-Lie Groups** - 04/2018
**TQFT and Categorification**

Cargèse, Corsica

**Mapping class group actions in Hopf algebra gauge theory** - 02/2018
**Workshop on Higher Gauge Theory**,

University of Leeds

**Mapping class group actions in Kitaev models and Hopf algebra gauge theory** - 09/2017
**100ème rencontre entre mathématiciens**,

et physiciens théoriciens

IRMA, Strasbourg

**Ideal tetrahedra and their duals in 3d gravity** - 07/2017
**Hopf Algebras in Kitaev’s Quantum Double Models**

Perimeter Institute for Theoretical Physics,

Waterloo, Canada

**Kitaev lattice models as a Hopf algebra gauge theory** - 06/2017
**GQT Graduate School and Colloquium**

Den Dolder, Netherlands

**Graph gauge theories with Hopf algebras** - 06/2017 Meeting on
**Noncommutative geometry and gravity**

ESI, Vienna

**Poisson homogeneous spaces in (2+1) gravity** - 06/2017
**Teichmueller theory and geometric structures on 3-dimensional manifolds**,

University of Luxembourg

**Ideal tetrahedra and their duals in 3d model spacetimes** - 05/2017
**Foundational and Structural Aspects of Gauge Theories**,

MITP, Mainz

**Hopf algebra gauge theories on ribbon graphs** - 03/2017
**Workshop on Quantum Topology,**Université Lille 1

**Kitaev lattice models as a Hopf algebra gauge theory** - 03/2017
**Women at the Intersection of Mathematics and High Energy Physics**

MITP, Mainz

**Kitaev lattice models as a Hopf algebra gauge theory** - 08/2016
**Quantum Structure of Spacetime and Gravity,**

COST network**QSPACE**, University of Belgrade

**Lecture series on 3d gravity** - 07/2016
**Classical and quantum symmetries in mathematics and physics**,

University of Jena

**Hopf algebra symmetries in 3d gravity** - 07/2016
**Modelling Topological Phases of Matter**

University of Leeds

**Kitaev lattice models as a Hopf algebra gauge theory** - 04/2016
**QG^2: Quantum Groups in Quantum Gravity**,

University of Waterloo, Canada

**Lecture Series: Mathematical approaches to 3d gravity** - 10/2016
**Quantum Spacetime ’16**,

Cost network QSPACE, Zakopane

**Hopf algebra gauge theories and Kitaev models** - 01/2016
**Colored Graphs and Random Tensors**LPT, Université Paris Sud, Orsay

**Hopf algebras and ribbon graphs** - 10/2015
**Higher topological quantum field theory and categorical quantum mechanics**,

ESI, Vienna

**Gray categories with duals and their diagrammatical description** - 09/2015
**Workshop on Noncommutative Field Theory and Gravity**,

Corfu, Greece

**Hopf algebra gauge theory and Kitaev lattice models** - 06/2015
**4th Seminar on Conformal Field theory**,

University of Darmstadt

**Hopf algebra gauge theory from Kitaev lattice models** - 06/2015
**2015 AMS-EMS-SPM International Meeting**University of Porto

**Topological lattice models as quantum gauge theories** - 06/2014
**93ème rencontre entre mathématiciens et physiciens théoriciens:**

**Riemann, la topologie et la physique**

IRMA, Strasbourg

**Generalised shear coordinates on moduli spaces of (2+1)-spacetimes** - 02/2014
**Modern trends in topological quantum field theory**,

ESI, Vienna

**Diagrams for Gray categories with duals** - 08/2013
**Workshop on 3d gravity**University of Worclaw

**Dynamical classical r-matrices in 3d gravity** - 09/2012
**90ème rencontre entre physiciens théoriciens et mathématiciens:**

**Lie et Klein; le programme d’Erlangen et son impact en physique et en mathématique**,

IRMA, Strasbourg

**Dirac gauge fixing and dynamical classical r-matrix symmetries in (2+1)-gravity** - 08/2012
**XXI International Fall Workshop on Geometry and Physics**

University of Burgos, Spain

**Gauge fixing and dynamical r-matrices in Chern-Simons theory** - 09/2011
**Workshop on Noncommutative Field Theory and Gravity**,

Corfu, Greece

**Gauge fixing and dynamical r-matrices in (2+1)-gravity** - 06/2011
**87ème rencontre entre physiciens théoriciens et mathématiciens:**

**Géométrie de Lorentz en mathématiques et en physique**,

Irma, Strasbourg

**Causality in 3d-spacetimes with particles** - 03/2011
**Main Lecture**,**DPG spring meeting 2011**

KIT, Karlsruhe

**Geometry and Observables in 3- dimensional (Quantum-) Gravity** - 09/2010
**Geometry and Physics in Cracow**

University of Cracow

**Observables for 3d gravity from higher categories** - 09/2010
**CLP 7 – Categories, Logics and Physics**

University of Birmingham

**Higher categories and observables for generalised Turaev-Viro models** - 09/2010
**Walkshop on Mathematical Physics**,

University of Jena

**Global geometry of Lorentzian 3-manifolds via lightlike geodesics** - 09/2010
**Workshop on Quantum Groups**,

University of Caen-Basse Normandie

**Quantum group symmetries and the torus universe** - 05/2010
**Noncommutativity and Physics: Spacetime Quantum Geometry**

Bayrischzell, Germany

**Observables for quantum gravity from higher categories** - 04/2010
**Géodycauserie III: Analysis, Geometry and Dynamics on Lorentz manifolds**

ENS Lyon

**Observers, time and measurements in 3d gravity** - 04/2010 Workshop
**QG10**,

Max Planck Institute for the Physics of Complex Systems, Dresden

**Gauge fixing and dynamical quantum group symmetries in (2+1)-gravity** - 12/2009
**Géodycauserie II: Spacetimes with particles**

University of Avignon

**Observables associated to constant curvature spacetimes** - 12/2009
**Transformation groups and Mathematical Physics**

Hamburg University

**Global geometry of Lorentzian 3-manifolds via lightlike geodesics** - 09/2009
**2nd School and Workshop on Quantum Gravity and Quantum Geometry**,

Corfu, Greece

**Geometry and observables in (2+1)-gravity** - 08/2009
**Chern-Simons Gauge Theory: 20 years after**

Hausdorff Center for Mathematics, Bonn

**Getting Physics from (2+1)-gravity: What does an observer in 3d gravity see?** - 06/2009
**XXV Max Born Symposium: The Planck Scale**,

University of Wroclaw

**Getting Physics from (2+1)-gravity: measurements via lightrays** - 04/2009
**Workshop on Gravity in Three Dimensions**,

ESI, Vienna

**Cosmological measurements, time, and observables in (2+1)-gravity** - 07/2008
**Noncommutative Deformations of Special Relativity**,

ICMS, Edinburgh

**Quantum double and kappa-Poincaré symmetries in (2+1)-gravity and Chern-Simons theory** - 06/2008
**QG2 2008: Quantum Geometry and Quantum Gravity**

The University of Nottingham

**3d loop quantum gravity and combinatorial quantisation** - 06/2008
**Theory Canada 4**,

Centre de Recherches Mathématiques, Montreal

**Quantum double and kappa-Poincaré symmetries in 3d gravity and Chern-Simons theory** - 06/2007
**Loops 07**,

Morelia, Mexico

**The cosmological constant in 3d gravity: towards a unified approach** - 07/2006
**Noncommutative Geometry and Physics: Fundamental Structure of Space and Time**,

Isaac Newton Institute for Mathematical Sciences, Cambridge

**(2+1)-dimensional gravity in the geometrical and in the Chern-Simons formulation** - 10/2005
**Loops ’05**,

Max Planck Institute for Gravitational Physics, Golm, Germany

**Grafting and Poisson structure in (2+1)-gravity with Lambda=0** - 07/2005
**Classical and quantum gravity in 3 dimensions**,

Scuola Normale Superiore, Pisa

**Grafting and Poisson structure in (2+1)-gravity with Lambda=0** - 10/2004
**Quantum Gravity in the Americas**,

Perimeter Institute for Theoretical Physics

Waterloo, Canada

**Phase space and Quantization of (2+1)-dimensional gravity in the Chern-Simons formulation** - 06/2003
**Geometry and physics of three-dimensional quantum gravity**,

ICMS, Edinburgh

**On the quantisation of (2+1)-dimensional gravity in the Chern-Simons formulation**