A list of all seminars of interest to us in the area is here:
Event page of the Kolleg Mathematical Physics Berlin
PhD student seminar on Campus Leben (organizer: Dirk Kreimer)
Every other Thursday, 13.00 st
Bernstein Center, Haus 6, Philippstr. 13 (Zoom, at present)
| 2021 | |||
|---|---|---|---|
| May 27 2021 | 10am: Paul Balduf | Linear Dyson-Schwinger-Equations in minimal subtraction | |
| May 27 2021 | 11am: Jens Lücke | Motic graphs and the Hopf algebra of R* | |
| June 10 2021 | 10am: Mattia Bocchi | Exceptional Field Theory – an Overview of Theory and Applications | |
| June 10 2021 | 11am: Michele Galli | Exceptional Field Theory – an Overview of Theory and Applications | |
| June 17 2021 | 10am: André Kaderli | Elliptic multiple polylogarithms in open string theory | |
| June 17 2021 | 11am: Daniele Artico | NUMERICAL INTEGRATION AND PHENOMENOLOGY PERSPECTIVES | |
| July 01 2021 | 10am: Max Mühlbauer | On Cutkosky’s Theorem | |
| July 01 2021 | 5pm: Nick Olson Harris | Groups of formal power series and the renormalization group equation | |
| July 08 2021 | postponed to fall | TBA | |
| July 08 2021 | 11am: tbd | TBA | |
| Feb 11 2021 | 10am: Jasper Roosmale Nepveu | Operator Bases and Renormalisation in Scalar Effective Field Theory | |
| Feb 11 2021 | 11am: Paul Balduf | tba | |
| 2020 | |||
| Jan 09 | Rene Klausen | GKZ hypergeometric systems and their relation to Feynman integrals | |
| May 14 | Max Muehlbauer | tbd | |
| May 28 | David Prinz | tbd | |
| June 11 | Paul Balduf | tbd | |
| June 25 | Rene Klausen | tbd | 2019 |
| February 14 | Nick Olson-Harris (Waterloo) | Equality of skew Schur functions | |
| February 28 | Lucas Nabergall (Waterloo) | Generalized chord diagram expansions | |
| March 14 | Ali Mahmoud (Waterloo) | On diffeomorphisms and tree level amplitudes | |
| April 11 | Paul Balduf (HU) | Perturbation theory of transformed quantum fields | |
| May 23 | David Prinz (HU) | Gauge Symmetries and Ward Identities in Quantum General Relativity | |
| June 20 | Matija Tapuskovic (Oxford U.) | Motivic Galois coaction on motivic Feynman integrals | |
| July 04 | Lucia Rotheray (TU Dresden) | tba | |
| Oct 17 | Lucas Harlan | The f-Vectors of the One Loop Moduli Spaces of Gluon Graphs | |
| Nov 28 | Henry Kissler | more cancellations and enormous zeros | |
| 2018 | |||
| November 08 | Sam Yusim (Waterloo) | — | |
| November 22 | William Dugan (Waterloo) | Sequences of Trees and Higher-Order Renormalization Group Equations | |
| December 06 | Saoirse Amarteifio (Imperial College) | Applying the machinery of perturbative quantum field theory to spatial Markov processes | |
Organised by Dirk Kreimer and his group:
Our research seminar
On Mondays, 15.00
Room 2’07, IRIS Building, Zum Großen Windkanal 6 (Zoom, at present)
12489 Berlin
| Summer 21 | |||
|---|---|---|---|
| April 19 | Rene Klausen (HU) | Kinematic singularities of Feynman integrals via GKZ hypergeometric systems | |
| April 30 14:00 | QFT Collquium: Emanuel Malek (HU) | Exceptional Field Theory and applications to the AdS/CFT correspondence | |
| May 03 | David Prinz (HU) | Gravitational Slavnov–Taylor Identities and Hopf Ideals | |
| May 10 | Johannes Thürigen(Münster) | Algebraic structure in renormalization of combinatorially non-local field theories | |
| May 17 | Marko Berghoff (Oxford and HU) | The analytic structure of parametric Feynman integrals | |
| May 25 | Physics Inst. Colloquium Laurent Lellouch (CPT) | Muon g-2: experiment, standard model and lattice quantum chromodynamics | |
| June 07 | Alexander Schmeding (Bergen, Norway) | Character groups of Hopf algebras from renormalisation as Lie groups | |
| June 14 | John Gracey (Liverpool) | The Wess-Zumino model at five loops | |
| June 21 | Walter van Suijlekom (Nijmegen) | Higher Chern-Simons and Yang-Mills forms in the spectral action | |
| June 25 at 2pm | QFT Kolloquium: Lorenzo Magnea (Torino U.) | The infrared structure of perturbative QCD | |
| June 28 | Gudrun Heinrich (KIT) | Multi-loop integrals and asymptotic expansions | |
| July 05 | Ben Ruijl (ETH Zürich) | Local Unitarity: a representation of differential cross-sections that is locally free of infrared singularities at any order | |
| Winter 20/21 | |||
| Nov 16 | IHES | Conference: Algebraic Structures in pQFT | |
| Nov 23 | canceled | - | |
| Nov 27 | QFT Kolloquium: Harvey Meyer | The hadronic contributions to the anomalous magnetic moment of the muon | |
| Nov 30 | Loic Foissy | Twisted Hopf Algebras | |
| Dec 07 | Raimar Wulkenhaar (Münster) | tba | |
| Dec 14 | Ali Mahmoud | tba | |
| Dec 16 14:00 | QFT Kolloq: Johanna Erdmenger | tba | |
| Jan 11 | Gerald Dunne | tba | |
| Jan 18 | Michael Borinsky (NIKHEF) | tba | |
| Jan 25 | Paolo Benincasa (NBI) | tba | |
| Jan 29 | QFT Kolloquium: Pierpaolo Mastrolia | tba | |
| Feb 08 | Alex Hock (Muenster) | tba | |
| Feb 26(!) | Gaetan Borot (HU) | QFT Kolloquium | |
| Summer 2020 | |||
| May 04 | Michael Borinsky (NIKHEF) | Fast Feynman parametric integral evaluation via tropical sampling | |
| May 11 | Konstantin Wernli (Notre Dame) | (Generalized) Hamilton Jacobi action in QFT | |
| May 18 | Henry Kissler (HU) | A diagrammatic anatomy of quantum EH gravity | |
| May 29(!)13:30 | QFT Kolloquium: Giulia Zanderighi (MPI Munich) | Precision at the LHC: why and how | |
| June 08 | Ralph Kaufmann (Purdue) | tbd | |
| June 15 | Yvain Bruned (Edinurgh) | tbd | |
| June 22 | John Gracey (Liverpool) | tbd | |
| July 06 | Kurusch Ebrahimi-Fard (NTNU, Norway) | tbd | |
| July 14(!) | KMPB Day! | tbd | |
| Winter 19/20 | |||
| October 21 | Marko Berghoff | What is a graph complex? | |
| November 04 | Johannes Brödel | Amplitude recursions with an extra marked point | |
| November 11 | Olaf Müller | Loose ends in quantization | |
| November 18 | Johannes Thürigen / WMU Münster | Locality in combinatorially non-local field theories: the Hopf algebra of 2-graphs | |
| November 25 | David Broadhurst / Open Univ. | Triangle, kite and tetrahedron diagrams | |
| December 02 | John Gracey /Liverpool | Bilinear quark operator renormalization and $\gamma^5$ | |
| December 09 | Marko Zivkovic / Univ. Luxembourg | Graph complexes: quasi-isomorphisms and extra differentials | |
| December 16 | Karen Vogtmann /Warwick Univ. | Outer space for right-angled Artin groups | |
| Summer 19 | |||
| April 01 | Mathias Schulze (U.Kaiserslautern) | Polynomials associated to graphs, matroids, and configurations | April 10 | KMPB Day | c2 invariant meets rook theory |
| April 15 | Karen Yeats (U.Waterloo and HU) | K5 | |
| April 29 | Ian Jack (U.Liverpool) | The a-theorem, scheme invariants and Hopf algebras | |
| May 06 | Andreas Maier (DESY-Zeuthen) | Binary black hole systems in a non-relativistic effective theory | |
| May 17 (!) | Eran Palti (MPP, Munich) | The Swampland and Emergence | |
| May 20 | Dirk Kreimer (HU) | Invariant Periods | |
| May 27 | Marcel Golz (HU) | tba | |
| June 03 | QFT Colloquium | tba | |
| June 17 | John Gracey (U.Liverpool) | Constructing infrared gluon propagators using gluon mass and Gribov copies | |
| June 24 | Konstantin Wernli (Zuerich U.) | On Locality and Renormalization in perturbative QFT | |
| July 01 | QFT Colloquium | tba | |
| July 08 | Julian Purkart(HU) | tba | |
| Winter 2018/19 | |||
| October 15 | dies academicus | — | |
| October 22 | Dirk Kreimer | Co-actions from Cubical Chain Complexes | |
| October 29 | Roman Zwicky (Edinburgh) | On RG-flow Theorems in d=4. | |
| November 12 | Karen Yeats (U.Waterloo & HU) | Some computational results on the c_2 invariant. | |
| November 13 | QFT-Kolloquium: Prof. Dr. Niklas Beisert (ETH Zuerich) | Yangian Symmetry and Integrability of Planar N=4 SYM | |
| November 19 | John Gracey (U.Liverpool & HU) | Focus on fixed points and emergent symmetries in scalar, fermion and gauge theories |
|
| December 03 | David Prinz (HU) | Gauge Symmetries and Renormalization | |
| December 10 | Nima Moshayedi (U.Zuerich) | The modified differential Quantum Master Equation | |
| December 17 | Erik Panzer (Oxford) | Solution of phi^4 theory on the 2-dimensional Moyal plane | |
| January 08 | QFT-Kolloquium: Prof. Dr. Lance Dixon (SLAC) | Bootstrapping Amplitudes in Planar N=4 Super-Yang-Mills Theory | |
| January 14 | Kurusch Ebrahimi-Fard (NTNU, Norway) | Relations between monotone, boolean and free cumulants | |
| January 28 | Michael Borinsky (NIKHEF) | The Euler characteristic of outer space | |
| February 04 | Loic Foissy (U.Littoral Cote d’Opale) | tba | |
| February 05 | QFT-Kolloquium: Prof. Dr. Karen Yeats (Waterloo) | tba | |
| February 11 | Julian Purkart (HU) | postponed to summer 2019 | |
| Summer 2018 | |||
| April 16 | dies academicus | — | |
| April 23 | David Broadhurst (Open U.) | Periods and quasi-periods in QFT | |
| April 30 | Conference | LL 2018 | |
| May 07 | defense Olof Ahlen – IRIS, R. 2.07 | tba | |
| May 14 | Pierre Clavier (U.Potsdam) | Resurgence theory and mass generation | |
| May 21 | tba | public holiday | |
| May 28 | Marcel Golz | tba | |
| June 04 | Les Houches | Houches QFT school | |
| June 11 | Les Houches | Houches QFT school | |
| June 18 | Experiences Les Houches Workshop | tba | |
| June 25 | Konrad Schultka (HU) | Toric Varieties and Feynman Graphs | |
| July 02 | Kay Schoenewald (DESY) | 3-loop corrections to deep inelastic scattering with two different masses |
July 09 | Dirk Kreimer | tba |
| Winter 2017/18 | |||
| October 16 | dies academicus | — | |
| October 23 | Zeuthen KMPB conference | Elliptic Integrals, Elliptic Functions and Modular Forms in Quantum Field Theory | |
| November 06 | Iain Crump (SFU&Waterloo U.) | Connections between the EGP and the c2 invariant | |
| November 13 | Marko Berghoff (HU) | Feynman amplitudes on moduli spaces of graphs | |
| November 20 | Christian Bogner (HU) | The analytic continuation of the sunrise and the kite integral | |
| November 27 | Michael Borinsky (HU) | > Hopf algebras and factorial divergent power series: Algebraic tools for graphical enumeration |
|
| December 04 | Johannes Thuerigen (HU) | Critical behaviour of Tensor models | |
| December 11 | Valentina Forini (City Univ. London) | Superstring worldsheet beyond perturbation theory | |
| December 18 | Erik Panzer (All Souls College, Oxford) | Counting master integrals with parametric annihilators | |
| December 19 | KMPB Day 9.30 10.45 14.00 |
ZGW 6, IRIS R. 2.21 Viktor Levandovskyy (RWTH Aachen): Annihilator of f^s: theory and computation Yang Zhang (ETH Zuerich): Module intersection method and Feynman integral reduction Mikhail Kalmykov (Hamburg): Hypergeometric functions and massive Feynman diagrams. |
|
| January 15 | David Jarossay (Geneva) | p-adic multiple zeta values and pro-unipotent harmonic actions | |
| January 22 | Daniela Cadamuro (TUM) | Lower bounds for the energy density in quantum integrable models | |
| January 29 | Yang Zhang (ETH Zuerich) | Cristal: A new efficient integration-by-parts (IBP) program based on module intersection | |
| February 05 | Dirk Kreimer (HU) | Multi-valued Feynman Graphs | |
| February 12 | Johannes Bluemlein (Desy Zeuthen Theory) | Elliptic Integrals in Higher Loop Calculations – from IBPs to \eta-weighted elliptic polylogarithms |
|
| Summer 2017 | |||
| April 24 | Franz Herzog (NIKHEF) | The R*-operation for generic euclidean Feynman graphs | |
| April 25 (!) | Franz Herzog (NIKHEF) | The 5-loop beta function in QCD | |
| May 08 | Dirk Kreimer (RUD25 1’327) | Remainder terms | |
| May 15 | Marko Berghoff | Amplitudes on the moduli space of graphs | |
| May 22 | Henry Kissler | QED at higher dimensions | |
| May 29 | Karen Yeats (U.Waterloo, Canada) | The c_2 invariant at p=2 graphically | |
| June 12 | Ralph Kaufmann (Purdue U.) | Feynman categories and moduli: decorated, derived and cubical | |
| June 15 !! RUD25, 1.315 4 pm !! |
Noriko Yui (Queen’s Univ., Canada & MPIM, Bonn) | Modularity/Automorphy of certain Calabi–Yau Varieties of CM type | |
| June 26 | Astrid Eichhorn (Heidelberg) | The status of asymptotic safety for quantum gravity | |
| July 03 | KMPB day | Oliver Schnetz (FAU Erlangen-Nuernberg), Karen Yeats (U.Waterloo & HU), Ralph Kaufmann (Purdue & HU) | |
| July 10 IRIS, 2.21 ! |
KMPB conference | Higgs Bundles, K3 Surfaces and Moduli | |
| July 17 | Claire Glanois | An eye on Modular forms and Periods | |
| Winter 2016/17 | |||
| October 31. | Dirk Kreimer | Remarks on Cutkosky rules and Field Diffeomorphisms | |
| November 07. | no seminar | Professorium Physik | |
| November 14 | Henry Kissler | On gauge dependence | |
| November 21. | Michael Borinsky | Asymptotic growth of periods | |
| November 28. | Marcel Golz | Simplifying the parametric Feynman integral in QED | |
| Dec 05. | Marko Berghoff | On Outer Space | |
| December 12 | Luise Adams (Mainz U.) | The sunrise and the kite integral in terms of an elliptic generalisation of the multiple polylogarithms | |
| December 15 (special seminar RUD25) | Dmitry Doryn (IBS-CGP, Pohang) | Differential models for B-type open-closed topological Landau-Ginzburg theories | |
| January 09 | Matteo Rosso (HUB) | Yangian invariance of N=4 super-Yang-Mills and ABJM | |
| January 16 | IMPRS Lecture Day | AEI | |
| January 30 | Thomas Willwacher (ETH Zuerich) | Graph complexes and configuration spaces: an overview | |
| February 20. | KMPB Day | Martin Gonzalez: Axel Kleinschmidt: Federico Zerbini: | |
| Summer 2016 | ||
|---|---|---|
| April 18. 14.30 | Dirk Kreimer | Field Diffeomorphisms and Green’s functions |
| April 25. | … | .. |
| May 02. | Karen Yeats (SFU) | Field diffeomorphisms and Bell polynomials. |
| May 10. | Nils Matthes (KMPB) | Elliptic double zeta values and the Fay-shuffle space |
| May 19. | Nils Matthes (KMPB) | The motivic coaction for elliptic multiple zeta values |
| May 30. | Franz Herzog (NIKHEF) | Soft Expansion by Region and Higgs Production |
| June 13 | Erik Panzer Oxford | The Hepp bound – a rational period |
| June 20 | KMPB day | Michael Borinsky : Factorially divergent expansions from a QFT perspective Oliver Schnetz : Numbers and Functions in Quantum Field Theory Christian Bogner : Multiple and elliptic polylogarithms for Feynman integrals |
| July 04 | Sophia Borowka Zuerich Univ. | Numerical evaluation of multi-loop integrals in Higgs boson pair production |
| July 11 | Kurusch Ebrahimi Fard ICMAT | A diagrammatic description of planar functional calculus |
| July tba. | Dmitry Doryn | The c_2 invariants of 4-regular graphs. |
| July 18. | ECM Congress in Berlin | .. |
| Winter 2015/16 | ||
| October 19. | Dirk Kreimer | .. |
| October 26. | Nguyen Viet Dang Lille | Complex powers of analytic functions and renormalization in QFT |
| November 02. | Pierre Cartier IHES | p-adic multizeta values (according to David Jarossay) |
| November 09. | David Broadhurst Open Univ. | Modular periods from determinants of Feynman integrals |
| November 16. | Johannes Brödel HU Berlin | Elliptic multiple zeta values and a special derivation algebra |
| November 23. | Anton Mellit Trieste | A proof of the shuffle conjecture |
| November 30. | Erik Panzer All Souls College/ Oxford | The parity theorem for multiple polylogarithms |
| December 07. | Joachim Kock Barcelona | Polynomial functors and combinatorial Dyson–Schwinger equations |
| December 14. | Ines Aniceto Krakau | Resurgence and Asymptotics in Quantum Theories: Beyond Perturbation Theory |
| January 11., 2016 | Oliver Schnetz Erlangen | Dimreg phi^4 with graphical functions |
| January 18., 2016 | John Gracey Liverpool | Higher dimensional gauge theories |
| January 25., 2016 | Lorenzo Tancredi Karlsruhe | The role of the space-time dimensions in simplifying systems of differential equations for Feynman Integrals. |
| April 20. | Dirk Kreimer | Cutkosky rules and outer space |
| April 27. | Nils Matthes Univ Hamburg | Elliptic analogues of multiple zeta values |
| May 11. | Olaf Kruger MPI Golm | Filtrations in Dyson-Schwinger equations: Next-to^{j}-leading log expansions systematically |
| May 18. | Dmitry Doryn MPI Mathematik Bonn | Some remarks on motivic denominator reduction |
| June 8. | Ralph Kaufmann Purdue | Hopf algebras from co-operad structures and Feynman categories and their relation to Tannakian categories |
| June 15. | Francis Brown Oxford Univ. | Irrationality proofs for zeta values and dinner parties |
| Fri June 26. 11 am |
Oliver Schnetz Univ. Erlangen | The Galois coaction and the structure of phi4 periods |
| June 29. | Mikhail Kalmykov Hamburg | Evaluation of Feynman Diagrams via hypergeometric functions representation |
| Tue. July 7 | SFB 647 Seminar: Ralph Kaufmann Purdue Francis Brown IHES/Oxford |
Feynman categories
From amplitudes to representations |
| Wed July 8 11 am |
Iain Crump SFU Burnaby | An invariant from incidence matrix permanents |
| July 13. | Reimar Wulkenhaar Univ. Münster | A solvable quantum field theory in 4 dimensions |
| Wed July 15 1 pm room 3.007 |
Clermont Dupont MPI Bonn | Purity for Brown’s moduli spaces, and the Gravity operad |
| Winter 2014/15 | ||
| Nov 03 | Roberta Iseppi Radboud University Nijmegen | The BV Formalism in the setting of Noncommutative Geometry: application to a U(2)-gauge invariant matrix model |
| Nov 10 | David Broadhurst Open Univ. | Polylogarithms of sixth roots of unity in quantum field theory |
| Nov 17 | Pierre Clavier Jussieu | Singularities and zetas in a Schwinger-Dyson equation |
| Nov 24 | Piotr Tourkine DAMTP Cambridge | Tropical Amplitudes |
| Dec 01 | Pierre Cartier IHES | Motivic Periods |
| Dec 08 | Costas Papadopoulos NCSR “Demokritos” Athen | Two-loop Master Integrals with the Simplified Differential Equations approach |
| Dec 15 | Markus Hihn HUB | .. |
| Jan 12 | Jacelyn Bell University of Liverpool | Vertex functions in QCD – a practical approach |
| Jan 19 | Joseph Ben Geloun MPI Potsdam | On the dimensional regularization and renormalization of rank=2 and 3 tensor models |
| Jan 26 | Daniela Egas Univ. Bonn | Comparing combinatorial Models of the Moduli space of Riemann surfaces |
| Jan 27, 2 pm | Norman Sieroka ETH Zuerich | Gauge Principle and Holography — Two contemporary concepts and their prehistory and philosophical background in the work of Hermann Weyl |
| Feb 09 | Ulf Kühn Hamburg | Multiple Eisenstein series and a new class of multiple q-zeta values |
| Summer 2014 | ||
|---|---|---|
| April 07 | Andreas Windisch Graz |
Non-perturbative properties of Landau gauge QCD correlation functions at vanishing and non-vanishing chemical potential |
| April 15 | Alexander Alexandrov FRIAS |
Matrix Models: a universal tool of mathematical physics |
| May 05 | Isabella Bierenbaum Hamburg |
From Loops to Trees via the Duality Method |
| May 12 | David Broadhurst open U. |
Algebraic geometry informs quantum field theory |
| May 19 | Gerald Dunne Connecticut |
Resurgent Trans-series from Uniform WKB |
| May 26 | Ralph Kaufmann MPIM Bonn |
Feynman, Hopf, Rota and Baxter. |
| June 02 | Andreas von Manteuffel Mainz |
Feynman integrals for ZZ production at NNLO |
| June 23 | Frederic Fauvet Strasbourg |
Resurgence monomials |
| June 30 | Burkhard Eden HU Berlin |
Constructing six-point NMHV correlators and amplitudes in N=4 SYM |
| July 07 | Francis Brown Jussieu |
tba |
| July 14 | Oliver Schnetz Erlangen/Berlin |
Phi^4 periods with 6th roots of unity |
| Winter 2013/14 | ||
| Oct. 28. | Dirk Kreimer HU Berlin |
Remarks on Cutkosky rules |
| Nov. 04. | Lutz Klaczynski HU Berlin |
Avoidance of a Landau pole by flat contributions in QED |
| Nov. 11. | Oliver Schnetz Erlangen / Berlin |
CANCELLED !!! |
| Nov. 18. | Dhritiman Nandan HU Berlin |
|
| Nov. 25. | Lionel Mason Oxford |
The holomorphic Wilson-loop: dlog forms of loop integrands and their evaluation |
| Dec. 02. | Susama Agarwala Hamburg |
Dihedral symmetries of multiple polylogarithms: polygons and symbols |
| Dec. 09. | Jean Alexandre Kings College |
Lorentz-symmetry violation and dynamical mass generation |
| Jan. 13. | Christian Bogner HU Berlin |
Multiple polylogarithms and Feynman integrals |
| Jan. 20. | Clemens Raab DESY Zeuthen |
Nested (inverse) binomial sums and new iterated integrals for massive Feynman diagrams |
| Jan. 27. | Pierre Vanhove IHES |
the physics and arithmetics of the banana graphs in two dimensions |
| Feb.03. | Kasper Larsen NIKHEF |
From Trees to Two Loops by Maximal Unitarity |
| Feb. 13. | Pierre Clavier | tba |
| Summer 2013 | ||
| April 22. | Dirk Kreimer HU |
On Parametric Representations |
| April 29. | Clement Dupont IMJ (Jussieu) |
Galois theory of periods and combinatorial Hopf algebras |
| May 13. | Claire Glanois IMJ (Jussieu) |
Motivic MZVs at Nth roots of unity |
| May 27. | Fabian Wissbrock DESY (Zeuthen) |
Heavy flavor contributions to DIS at $O(\alpha_s^3)$: Diagrams with Two masses and nested topologies |
| June 03 | David Broadhurst Open University |
Polylogarithms from Schlaefli to Schwinger |
| June 17 | Marc Bellon LPTHE Jussieu |
Solving Schwinger-Dyson equations: a door to the high orders of perturbation theory |
| June 24 | Francis Brown IMJ (Jussieu) |
On associators |
| June 26 2 pm |
John Gracey Liverpool |
Exploring the Wess-Zumino model at high loops |
| June 26 3 pm |
Ralph Kaufmann Purdue Univ. |
Feynman categories and new perspective on Hopf algebras |
| July 01 | Karen Yeats SFU Burnaby |
tba |
