Seminars

Regular Seminars Summer Semester 2025

Our regular seminar takes place on Tuesdays at 2 pm in the Erwin-Schrödinger Lecture Hall, 1090 Vienna, Boltzmanngasse 5, 5th floor.

Accordion Menu

I will give a general introduction to higher-form symmetries and their gauging and discuss both of these in the context of defect TQFTs. Following the insight that ordinary, group-like global symmetries can be described by topological codimension 1 defects, higher-form symmetries are the generalization to arbitrary codimension. A natural question is how to gauge (higher-form) symmetries from this perspective. I will briefly motivate the orbifold construction as a tool for gauging and present a new construction that produces a candidate orbifold datum from 2-group symmetries in 3d. Lastly, I will use this construction to recover a known class of orbifold data from a 0-form symmetry and show how its gauging can be undone by the gauging of an emergent 1-form symmetry.

We consider type II string theory on Calabi-Yau threefolds with B-type D-branes. Hybrid models appear in limiting regions of the stringy Kahler moduli space of the Calabi-Yau. They are Landau-Ginzburg models fibred over a compact base manifold. We give a physics derivation of B-type D-branes in hybrids and show that they are matrix factorisations of the hybrid superpotential, combined with geometric data associated to the base. Lifting these branes to the gauged linear sigma model (GLSM) and making use of the GLSM hemisphere partition function, we establish a connection between geometric and hybrid branes. As an application, we discuss a hybrid model that shares the moduli space with a well-known two-parameter Calabi-Yau hypersurface. This is joint work with Robert Pryor.

We review aspects of the axiomatic program of compositional quantum field theory from its origins in TQFT to its aspirations in quantum gravity. We present some of its applications so far: From a generalized S-matrix via evanescent particles to the time-of-arrival problem. We point out open problems and some future directions.

Recently, a matrix formulation of a three-dimensional quantum space was proposed. The basic idea is that (in)finite number of fuzzy spheres can be glued together in a specific way. During the seminar, we will discuss the construction of the model with some recent examples from field theory, quantum mechanics and classical physics.

The AdS/CFT correspondence is a duality stating that quantum gravity in an AdS spacetime is equivalent to a conformal field theory (CFT) on its boundary. Its development has been a central topic in theoretical physics for the past 25 years. However, its extension to non-AdS backgrounds, such as flat space, remains challenging. A recent proposal suggests that 4D quantum gravity in flat space could be dual to a 2D celestial CFT on the sphere. The discovery of deep connections between Weinberg’s soft theorems and asymptotic charge conservation established a direct link between bulk soft operators and celestial CFT symmetry generators, including the stress tensor. This led to the computation of the CCFT central charge, which was found to be zero. Since a unitary CFT with vanishing central charge is trivial, alternative nontrivial CFTs must be considered. One such class is logarithmic CFTs (LCFTs), characterized by logarithmic behavior in correlation functions. In our work, we analyzed the field content of CCFT and found that two specific infrared bulk modes form a logarithmic CFT doublet. We discuss this result in relation to previous observations of logarithmic structures in the IR-finite part of celestial OPEs.

Motivated by group-theoretical questions that arise in the context of asymptotic symmetries in gravity, we study model spaces and their quantization from the viewpoint of constrained Hamiltonian systems. More precisely, we propose a definition of a model space for a generic Lie group G as a suitable second class constrained system associated to the cotangent bundle $T^{*}G$. Before turning to the non-compact infinite-dimensional groups relevant in the gravitational setting, we work out all details in the simplest case of $\mathrm{SU}(2)$. Besides recovering well-known results on the quantum theory of angular momentum from a unified perspective, the analysis sheds some light on the definition and properties of spin-weighted/monopole spherical harmonics.

Further seminars co-organised by members of the group:

Past Seminars (since 2016):

  • Babak Haghighat (Tsinghua University, BIMSA) on "Foams and KZ-equations in Rozansky-Witten theories" (21.01.2025)
  • Vincentas Mulevicius (University of Vienna) on "Topological features in lattice models" (14.01.2025)
  •  Nabil Iqbal (Durham University) on "Machine learning approach to duality in statistical physics" (07.01.2025)
  • Ödül Tetik (University of Vienna) on "The topology of deformation quantization" (17.12.2024)
  • Ingmar Saberi (LMU Munich) on "Local Superconformal Algebras" (10.12.2024)
  • Marina Moleti (SISSA, Trieste) on “Calabi-Yau threefold flops as quiver varieties from monopole deformations“ (02.12.2024)
  • Christian Gass (University of Vienna) on "Propagators in curved spacetimes from operator theory" (26.11.2024)
  • Fabio Apruzzi (University of Padova) on "Aspects of generalized symmetries from string theory: symmetry theories and generalized charges" (19.11.2024)
  • Christian Northe (Czech Academy of Sciences) on "Entanglement Resolution and boundary CFT" (12.11.2024)
  • Muyang Liu (University of Southern Denmark) on "Exploring Magnetic Quiver through Data Analysis and Machine Learning: Unveiling Patterns and Towards Predictive Models" (05.11.2024)
  • Pei-Ming Ho (National Taiwan U) on "Hawking Radiation After Scrambling Time" (29.10.2024)
  • Fabio Marino (U of Vienna) on "Mirror Symmetry and the Dualization Algorithm" (22.10.2024)
  • Clemens Sämann (U of Vienna) on "Non-regular spacetime geometry via metric geometry and optimal transport" (15.10.2024)
  • Axel Kleinschmidt (MPI for Gravitational Physic) on "From exceptional geometry to matrix models" (08.10.2024)
  • Ilija Buric (University of Pisa) on  “Fuzzy de Sitter spaces in three and four dimensions" (18.06.2024)
  • Nava Gaddam (ICTS Bangalore) on  “Holography of Information in a Ball of Finite Radius" (11.06.2024)
  • Michele Del Zotto (University of Uppsala) on “Exploring the higher structure of symmetries" (04.06.2024)
  • Marcus Sperling (University of Vienna) on "Higgs Branch RG-flows — Decay and Fission of Magnetic Quivers" ( 07.05.2024)
  • Abhiram Kidambi (Max Planck Institute for Mathematics in the Sciences, Leipzig, Germany) on "Non-holomorphic Eisenstein Series and Quadratic Forms in Holography" ( 25.04.2024)
  • Dmitri Vassilevich (Universidade Federal do ABC, Brazil) on "Poisson sigma models, Poisson diffeomorphisms, and holography" (18.04.2024)
  • Ilarion Melnikov (James Madison Univ. / IPhT Saclay) on "Topology change and heterotic flux vacua" (31.10.2023)
  • Weizhen Jia (Illinois) on "Weyl-Ambient Metrics, Obstruction Tensors and Their Roles in Holography" (24.10.2023)
  • Dr. Thibault Damour  (IHES - Institut des Hautes Etudes Scientifiques) on "Black Hole Binary Dynamics from Classical and  Quantum Gravitational Scattering" (17.10.2023)
  • Giovanni Canepa (UZH) on „Three-dimensional gravity in the BV-BFV formalism“ (07-03-2023)
  • Edoardo D'Angelo (Genoa University) on „Relative entropy and dynamical black holes“ (14-03-2023)
  • Gerben Oling (Nordita) on „Galilean and Carrollian limits of non-relativistic strings“ (21-03-2023)
  • Robert Brandenberger (McGill U) on „Some approaches to superstring cosmology“ (28-03-2023)
  • Eleanor Harris (King's Coll- London) on „A little piece of quantum de Sitter“ (18-04-2023)
  • Alessia Platania (Perimeter Inst-) on „Non-perturbative strings, asymptotic safety, and the swampland“ (25-04-2023)
  • Geoffrey Compère (Brussels U-) on „An asymptotic framework for gravitational scattering“ (02-05-2023)
  • Vincentas Mulevicius (Vilnius University) on „Internal Levin-Wen models“ (11-10-2022)
  • Max Riegler (TU Wien) on „Flat Space Holography in 3D“ (18-10-2022)
  • Michel Pannier (University Jena) on „Massive Higher-Spin Fields in Three-Dimensional Asymptotically Flat Spacetimes“ (25-10-2022)
  • Georgios Linardopoulos (Wigner Research Centre for Physics) on „String integrability of defect CFT and dynamical reflection matrices“ (8-11-2022)
  • Sergei Ovchinnikov (L-V- Kirensky Institute of Physics) on „Uniqueness of supersymmetric AdS5 black holes“ (22-11-2022)
  • Francesco Sartini (ENS, Lyon) on „Hidden symmetries in cosmology and black holes“ (29-11-2022)
    Siye Wu (U of Colorado Boulder) on „Discrete fluxes, higher-form symmetries and Ward identities“ (6-12-2022)
  • Sebastian Schuster (Saarland U) on „Distracted by Science-Fiction: The Physics of Reverse-Engineered Metrics“ (13-12-2022)
  • Aindriú Conroy (Charles U) on „The anti-Unruh effect in black hole spacetimes“ (10-1-2023)
  • Pascal Anastasopoulos (HEPHY) on „Anomalous and axial Z' contributions to g-2“ (17-1-2023)
  • Stephan Stieberger (MPI für Physik) on „Elements of Celestial Conformal Field Theory“ (24-1-2023)
  • Richard Dawid on "Stringtheorie: Spekulation oder abgesicherte Theorie?" (30-06-2022)
  • Roberto Oliveri (LUTH, Paris Meudon) on "Metric reconstruction for non-radiative spacetimes" (28-06-2022)
  • Ingmar Saberi (LMU) on "Twisted eleven-dimensional supergravity and exceptional Lie algebras" (14-06-2022)
  • Arjun Bagchi (Indian Inst. Tech. Kanpur) on "Holography for Flatspace: The Carroll Perspective" (14-06-2022)
  • Michele Del Zotto (Uppsala University) "on the 6d Origin of 4d Non-invertible Duality Defects"
  • Bin Chen (Peking U.) "On Galilean Conformal Field Theory" (25-05-2022)
  • Oliver Schlotterer (Uppsala University) on "Recent developments in superstring loop amplitudes" (17-05-2022)
  • Aaron Poole (Southampton U.) on "Charges, conserved quantities and fluxes in de Sitter spacetime." (10-05-2022)
  • Massimo Taronna (Naples U.) on "From dS to AdS and back" (03-05-2022)
  • Michael Kramer (MPG Bonn) on "Probing relativistic gravity with radio astronomy" (26-04-2022)
  • Jakob Salzer (Universite Libre de Bruxelles) on "IR divergences and the effective action of supertranslation modes" (05-04-2022)
  • Rohan Poojary (TU Wien) on "Fast Scrambling due to Rotating Shockwaves in Rotating Black Holes" (29-03-2022)
  • Jurai Tekel (Comenius University Bratislava, Slowakia) will talk on "String modes and fuzzy field theories in string modes formalism" (22-03-2022)
  • Simone Speziale (Marseille, CPT) on "New symmetries for general relativity" (15-03-2022)
  • Frans R. Klinkhamer (Institute for Theoretical Physics, Karlsruhe Institute of Technology) on "Emergent spacetime from the bosonic master field of the IIB matrix model" (08-03-2022)
  • Thomas Mertens (Gent University) on "Liouville and JT quantum gravity" (01-03-2022)
  • Masanori Hanada (Department of Mathematic, University of Surrey, GB) on "Entanglement between matrix degrees of freedom and QFT counterpart of entanglement island" (25-01-2022)
  • Emmanuele Battista (University of Vienna) on "Gravitational waves in Einstein-Cartan theory." (11-01-2022)
  • Vittorio De Falco (University of Naples "Federico II") on "New analytic method to deal with dissipative systems. Application to the general relativistic Poynting-Robertson effect" (14-12-2021)
  • Johannes Lahnsteiner (University of Groningen) on "Non-Lorentzian Supergravity in Ten Dimensions"
  • Martí Rosselló (IST Lisbon) on "Rademacher expansion from symplectic symmetries of the Siegel modular form: An N=4 counting story" (20-11-2021)
  • Paul Oehlmann (Uppsala University) on "Mirror dual Elliptic fibrations and F-theory" (23-11-2021)
  • Ingo Runkel (University of Hamburg)  on "Topological defects and generalised orbifolds" (16-11-2021)
  • Paola Rioseco (Junior Research Fellow ESI / Center of Mathematical Modeling U. Chile) on "Relativistic kinetic theory with applications in astrophysics" (09-11-2021)
  • Benjamin Koch (TU Wien) on "Almost relevant corrections for direct measurements of electron's g-factor" (19-10-2021)
  • Detlev Buchholz on "Classical dynamics, arrow of time, and the origin of Heisenberg's commutation relations" (12-10-2021)
  • Elias Kiritsis (CCTP) on "Emergent gravity from hidden sectors and TT deformations" (13-07-2021)
  • Abhiram Kidambi (Kavli IMPU, University of Tokyo) on "Generalized Siegel-Weil formula, Chern-Simons invariants and 3d gravity" (29-06-2021)
  • Jun Nishimura (KEK) on "Exploring the beginning of the universe by a nonperturbative formulation of superstring theory" (15-06-2021)
  • Dieter Luest (LMU Munich)  on "The swampland at a large number of space-time dimensions" (08-06-2021)
  • Claudia de Rham (Imperial College London)  on "Positivity with gravity" (25-05-2021)
  • Johannes Thürigen (Universität Münster) on "BPHZ renormalization in combinatorially non-local field theory" (18-05-2021)
  • Charles Marteau (British Columbia University) on "From baby universes to black holes in 2d flat space gravity" (11-05-2021)
  • Linus Wulff (Masaryk University) on "O(D,D) and string alpha'-corrections" (13-04-2021)
  • Klaus Sibold (University Leipzig) on "Perturbative Quantization of Einstein-Hilbert Gravity" (23-03-2021)
  • Mahdi Godazgar (Queen Mary University) on "Asymptotic charges in gravity" (16-03-2021)
  • Lukas Müller (Heriot-Watt University) on "Anomalous field theories as boundaries" (09-03-2021)
  • Marc Geiller (ENS Lyon)  on "A new look at symmetries of 3d gravity" (16-02-2021)
  • Christoph Nega (University of Bonn) on "Analytic Structure of Banana Feynman Integrals" (09-02-2021)
  • Prateek Agrawal (Oxford U.). on "Topological Gravity as the Early Phase of our Universe" (26-01-2021)
  • Joshua Kames-King (University of Bonn) on "Deformations of JT Gravity and KdV Equations" (19-01-2021)
  • Shahin Sheikh Jabbari (IPM) on "Temperature of Black Holes in Horndeski Gravity Theories" (12-01-2021)
  • Severin Lüst (Harvard) on "The Tadpole Problem" (15-12-2020)
  • Laurent Freidel (Perimeter Institute) on "Quantum gravity at the corner" (8-12-2020)
  • Wolfgang Wieland (IQOQI Vienna) on "Observables vs. gauge symmetries: lessons from the quasi-local approach" (01-12-2020))
  • Flavio Tonioni (Liverpool U.) on "Misaligned Supersymmetry and Anti-D-branes" (24-11-2020)
  • David Andriot (TU Vienna) on "Do classical de Sitter string backgrounds exist?" (17-11-2020)
  • Adrien Fiorucci (Université Libre de Bruxelles) on "The Λ-BMS Charge Algebra in n dimensions" (10-11-2020)
  • Yuhma Asano (Uni Vienna) on "M-brane Realisation in Matrix Models" (03-11-2020)
  • Nezhla Aghaei (DESY Hamburg) on "Towards Super Teichmüller Spin TQFT" (13-10-2020)
  • Edgar Shaghoulian (Cornell University) on „Looking for islands“ (06-10-2020)
  • Jarkko Peuron (ECT Trento) on "Heavy quark diffusion in an overoccupied gluon plasma" (21-07-2020)
  • Henning Samtleben (ENS-Lyon) on "Kaluza-Klein spectrometer from exceptional field theory" (30-06-2020)
  • Ilka Brunner (LMU Munich) on "Flows, defects, and transport of D-branes" (23-06-2020)
  • Kevin Grosvenor (University of Wuerzburg) on "Entanglement entropy and subregion complexity in thermal perturbations around pure-AdS" (16-06-2020)
  • Evgeny Skvortsov (Albert Einstein Institute Potsdam Golm) on "(Quantum) Higher Spin Gravity and applications to Physics" (19-05-2020)
  • Alessandra Gnecchi (CERN Geneva) on "AdS7 Stability" (28-04-2020)
  • Matthew Roberts (Imperial College London) on „Breaking translations, keeping SUSY“ (10-03-2020)
  • Yann Mambrini University: LPT Orsay will talk on „Alternative scenarios for dark matter productions in the Early Universe, and its consequences“ (24-02-2020)
  • Claude Duhr (CERN, Switzerland) on „From geometry to high-energy scattering in N=4 Super Yang Mills at all order“ (28-01-2020)
  • Jose Edelstein (Univ. Santiago de Compostela, Spain) on „Beyond General Relativity: causality issues and geometric inflation“ (21-01-2020)
  • Poulami Nandi (TU Wien, IIT Kanpur) will talk on „Conformal Carrollian Field Theories on null Manifolds“ (14-01-2020)
  • Max Riegler will talk on "Geometric actions and flat space holography'' (07-01-2020)
  • Loriano Bonora (SISSA, Trieste) on „A YM-like theory with infinite many fields“ (17-12-2019)
  • Jelle Hartong University of Edinburgh will talk on „Non-relativistic expansion of general relativity“ (10-12-2019)
  • Donald Ray Youmans (University of Geneva) on „Two-dimensional BF theory as a CFT“ (03-12-2019)
  • Hadi Godazgar (MPI, Potsdam) will talk on „Dual and extended asymptotic charges“ (26-11-2019)
  • Michael Borinsky (NIKHEF, Amsterdam) on „The graphical function method applied to phi^3 in D=6“ (19-11-2019)
  • Romain Ruzziconi (Université libre de Bruxelles, Belgien) on „The Λ-BMS4 group of dS4 and new boundary conditions for AdS4“ (12-11-2019)
  • Stefan Prohazka ULB, Belgien on „Maximally symmetric spacetimes reconsidered“ (05-11-2019)
  • Hamid Afshar (TU Wien) on „2d flat space holography and warped-Schwarzian theory“ (22-10-2019)
  • Ida Zadeh (ICTP, Triest) on „Lifting BPS States on K3 and Mathieu Moonshine“ (15-10-2019)
  • M.M. Sheikh-Jabbari (IPM Teheran & ICTP Trieste) on „T-witts on the soft hair program“ (08-10-2019)
  • Anton Rebhan on „The hadronic light-by-light scattering contribution to the muon g − 2 from holographic QCD“ (01-10-2019)
  • Jakub Vošmera (Institute of Physics of the Czech Academy of Sciences, Prague) on „Unconventional D-branes on T^4“ (25-06-2019)
  • René Meyer (Universität Würzburg) on „Electron Hydrodynamics & Black Holes in Anti de Sitter Space-time“ (18-06-2019)
  • Eric Sharpe Virginia Tech (Blacksburg, USA) on „A proposal for nonabelian mirrors in two-dimensional theories“ (28-05-2019)
  • Olga Papadoulaki (ICTP, Trieste) will talk on „Euclidean Wormholes and Holography“ (21-05-2019)
  • Sergio Hörtner (Universidad Autónoma de Madrid) on „Gravitational duality near cosmological space-times“(14-05-2019)
  • Piotr Chruściel (Univ. Wien) „On positivity of energy in higher dimensions“ (07-05-2019)
  • Harald Skarke (TU Wien) on „Abundant sets of internal spaces for string theory“ (30-04-2019)
  • Marco Bochicchio (INFN Roma) on „Renormalization in large-N QCD and open/closed string duality“ (09-04-2019)
  • Lisa Glaser (UV) on„Spectral dimension and other geometry estimators in random fuzzy spaces“ (02-04-2019)
  • Pulastya Parekh (Indian Institute of Technology Kanpur, India) on „Tensionless strings : A perspective from the worldsheet“ (30-01-2019)
  • Emanuel Malek Max Planck Institute for Gravitational Physics, Potsdam on „ Exceptional geometry of supersymmetric AdS vacua“ (23-01-2019)
  • Philipp Stanzer (TU Wien) will talk on „Quantum Null Energy Condition – Analytic, Perturbative and Numerical Results“ (15-01-2019)
  • Georg Stettinger University of Groningen, Netherlands on „Infinite derivative gravity in 2+1 spacetime dimensions“ (08-01-2019)
  • Marco Bertolini (Kavli IPMU  ‐ The University of Tokyo) on 'A (0,2) mirror duality' (18-12-2018)
  • Peter Schupp (Jacobs University Bremen) on `Gravity as graded spacetime (quantum) mechanics' (11-12-2018)
  • Stefan Groot Nibbelink (Rotterdam University of Applied Sciences) on `Tension Between a Vanishing Cosmological Constant and Non-Supersymmetric Heterotic Orbifolds' (30-11-2018)
  • Abhiram Kidambi (TU Vienna) on „Number theoretic aspects of black hole entropy in 4d string compactification“ (04-12-2018)
  • Christian Northe (Uni Würzburg) on „Boundary RG flows, Kondo and AdS/CFT“ (27-11-2018)
  • Céline Zwikel (TU Wien) on „Asymptotic symmetries of three-dimensional black strings“ (20-11-2018)
  • Wolfgang Wieland (Perimeter Institute for Theoretical Physics, Waterloo, Canada) on „Loop Quantum Gravity and the Continuum“ (13-11-2018)
  • Niccolò Cribiori (TU Wien) on `Linear versus Non-linear Supersymmetry' (06-11-2018)
  • Max Riegler (Université Libre de Bruxelles, Bruxelles, Belgium) on `Warped Black Holes in Lower-Spin Gravity' (30-10-2018)
  • Maulik Parikh (Arizona State University, Tempe, Arizona) on `The Three Laws of Future Light Cone Thermodynamics' (23-10-2018)
  • Glenn Barnich (Université Libre de Bruxelles) on `Electromagnetic edge modes and black hole entropy' (16-10-2018)
  • Avik Banerjee (Saha Institut of Nuclear Physics, India) on `Strings, Branes, Schwarzian action and Maximal Chaos' (09-10-2018)
  • Karapet Mkrtchyan (Max-Planck-Institut, Potsdam) on `Interactions of massless bosons in three dimensions' (02-10-2018)
  • Zoltan Bajnok (Wigner Research Centre, Budapest) will talk on `Integrable aspects of the AdS/CFT duality' (25-09-2018)
  • Thorsten Schimannek (Univ.  Bonn) on `Fourfolds, integral Fluxes and Modularity' (26-06-2018)
  • Prof. Martin Schnabl (Univ. Prag) on `Topological defects in open string field theory' (19-06-2018)
  • Prof. T. R. Govindarajan (Chennai, Indien) on `Should photon mass be zero?' (12-06-2018)
  • Peter Presnajder (Comenius University Bratislava) on `Quantum systems in relativistic fuzzy spaces' (05-06-2018)
  • Amihay Hanany (Imperial College London) on `Discrete Gauging and Small E8 instantons in six dimensions' (29-05-2018)
  • Gabriele Tartaglino-Mazzucchelli (KULeuven) on `Curvature squared invariants in 6D N=(1,0) supergravity' (08-05-2018)
  • Marcus Sperling (University of Vienna) on `Intersecting branes, Higgs sector, and chirality from N=4 SYM with soft SUSY breaking' (24-04-2018)
  • Linus Wulff (Masaryk University, Brno) on `Generalized supergravity and non-abelian T-duality anomaly' (17-04-2018)
  • Pascal Anastasopoulos (University of Vienna) on `Yukawas of light stringy states' (13-03-2018)
  • Peter Allmer (Vienna) on „Fusion of defects in Landau - Ginzburg models in a functorial approach“(23-01-2018)
  • Yihao Yin (Universidad Andres Bello, Santiago de Chile) on 'Vasiliev's equations, (A)dS backgrounds and perturbations' (12-01-2018)
  • Philip Hacker (TU Wien) on „Soft hairy warped black hole entropy“ (12-12-2017)
  • Nikola Gushterov (Oxford U.) on `Holographic Entanglement Density' (05-12-2017)
  • Daniel Fernandez (Iceland U.) on `Entanglement entropy at non-equilibrium in holography' (28-11-2017)
  • Athanasios Chatzistavrakidis (Rudjer-Boskovic-Institute Zagreb) on `Double Field Theory and Membrane Sigma Models' (21-11-2017)
  • Abhiram M. Kidambi (TU Wien) on `Calabi-Yau manifolds and sporadic groups' (14-11-2017)
  • Harold Steinacker (Uni Wien) on 'Quantized cosmological space-times from Yang-Mills matrix models' (07-11-2017)
  • Cedric Troessaert (MPI für Gravitationsphysik, Potsdam) on 'BMS4 at spatial infinity' (24-10-2017)
  • Shailesh Lal (Paris, LPTHE) on 'Quantum Effects in Higher Spin Holography and Tensionless AdS Strings' (17-10-2017)
  • Andrea Campoleoni (ETH Zürich) on 'Higher-spin BMS symmetries in four dimensions and soft theorems' (16-10-2017)
  • Harald Grosse (Uni Wien) on 'Quantum field theory models on noncommutative spaces' (12-10-2017)
  • Olaf Krüger (Uni Wien) on 'The Embedding of gauged N = 8 supergravity into 11 dimensions' (10-10-2017)
  • Jnanadeva Maharana (Institute of Physics, Bhubaneswar) on 'High energy behavior of scattering cross sections' (03-10-2017)
  • Christoph Roupec (Uni Wien) on 'Inflation in Supergravity' (27-06-2017)
  • Andjelo Samsarov (Ruder Boskovic Institute, Zagreb) on 'Black hole quasinormal modes in twisted models of matter minimally coupled to gravity' (30-05-2017)
  • Yang-Hui He on 'Calabi-Yau Volumes and Reflexive Polytopes' (23-05-2017)
  • Anton Alekseev (University of Geneva) on 'Path integrals for Wilson lines and Wilson surfaces' (16-05-2017)
  • Tristan McLoughlin (Trinity College Dublin) on 'Twistors and Conformal Higher-Spin Theory' (09-05-2017)
  • Stefano Cremonesi (Durham University) on 'The infrared physics of bad theories' (24-04-2017)
  • Harold Steinacker (Uni Wien) on `Covariant Quantum Spaces, the IKKT-model & Gravity' (04-04-2017)
  • Eric Bergshoeff (University of Groningen) on `Applied Newton-Cartan Geometry' (21-03-2017)
  • Volker Branding (Uni Wien) on `The full bosonic string as a geometric variational problem' (14-03-2017)
  • Rutger Boels (DESY, Hamburg) on `Minimal Quantum Field Theory' (31-01-2017)
  • Johanna Knapp (TUWien) on `Calabi-Yau compactifications and supersymmetric gauge theory' (24-01-2017)
  • Pan Kessel (MPI für Gravitationsphysik, Potsdam) on `Four-dimensional Vasiliev Theory : An Introduction' (17-01-2017)
  • Marcus Sperling (University of Vienna) on `Properties of the monopole formula' (10-01-2017)
  • Joris Raeymaekers (Prague) on `Multi-centered AdS3 solutions from Virasoro conformal blocks' (19-12-2016)
  • Yuhma Asano (DIAS, Dublin) on `Emergent geometries in the BMN matrix model' (13-12-2016)
  • Maja Buric (Belgrade University) on `Noncommutative spaces and differential geometry' (22-11-2016)
  • Miguel Tierz (Lisbon University) on `Matrix models and phase transitions in supersymmetric gauge theories in three dimensions' (15-11-2016)
  • Raimar Wulkenhaar (Münster) on `Exact solution of quantum field theory toy models' (08-11-2016)
  • Enrice Brehm (LMU, München) on `Classical Holographic Codes' (25-10-2016)
  • Andrea Campoleoni (ULB, Brussels) on `Higher spin theories from a Hamiltonian viewpoint' (18-10-2016)
  • Iva Lovrekovic (TUWien) on `Conformal gravity in four dimensions' (11-10-2016)