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Dr Burkhard Eden (Humboldt-University Berlin)29/09/2025, 09:30
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Dr V. Chestnov29/09/2025, 10:30
Perturbative higher-point scattering amplitudes present both conceptual and computational challenges. Their Feynman integral building blocks rapidly grow in complexity in multi-scale kinematics, motivating the use of new tools from computational algebraic geometry. Viewing these integrals as twisted period integrals further reveals deep connections to the theory of D-modules and modern...
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Dr A. Testa29/09/2025, 11:10
In this talk, I will analysis special correlation functions of chiral primary half-BPS operators in four-dimensional N=2 superconformal circular quiver theories. Supersymmetric localization reduces these observables to matrix integrals which, in the planar limit, can be expressed as certain Fredholm determinants, known in this context as generalized Tracy–Widom distribution. This...
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Dr J. Brödel29/09/2025, 12:20
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Dr A. Kleinschmidt29/09/2025, 13:00
The motivic coaction of multiple zeta values and multiple polylogarithms encodes both structural insights on and computational methods for scattering amplitudes in a variety of quantum field theories and in string theory. I will report on work in progress with Franziska Porkert and Oliver Schlotterer where we propose coaction formulae for iterated integrals over holomorphic Eisenstein series...
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Dr S. Banik29/09/2025, 13:40
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NN29/09/2025, 15:00
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Prof. M. Billo30/09/2025, 09:00
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Dr A. Pini30/09/2025, 10:30
We consider the four-dimensional N=2 superconformal quiver gauge theory
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arising from a Z2 orbifold of N=4 super Yang–Mills. Exploiting
supersymmetric localization, we analyze different types of integrated
correlators. In particular, we obtain exact expressions valid in the
large-N limit of the theory for integrated correlators involving two
Coulomb branch operators and two moment map... -
Dr G. Ferrando, G. Lefundes30/09/2025, 11:10
We propose an integrability approach for planar three-point functions at finite coupling in N=2 superconformal field theories obtained as Z_K orbifolds of N=4 super Yang-Mills (SYM). Generalising the hexagon formalism for N=4 SYM, we reproduce the structure constants of Coulomb branch operators, previously obtained by supersymmetric localisation, as exact functions of the 't Hooft coupling....
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Prof. C. Kristjansen30/09/2025, 12:20
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Prof. J. Drummond30/09/2025, 13:00
Scattering amplitudes are dual to polygonal light-like Wilson loops in planar N=4 super Yang-Mills theory. Here we will explore the computation of multiple light-like loops and demonstrate that many techniques familiar from the amplitude/single loop case extend to correlators of multiple loops, in particular one may use supertwistor Wilson loops, BCFW recursion and Q-bar equations to...
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30/09/2025, 14:20
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30/09/2025, 17:00
The HU Adlershof campus is situated at the historical Johannisthal airfield. We will visit a number of sites from aviation research.
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Dr C. Wen01/10/2025, 09:00
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Dr C. Shi01/10/2025, 10:30
The squared amplitude has emerged as a remarkable object in both planar N=4 SYM and ABJM theory. In N=4, its duality with Wilson loops and correlators implies that the N-point, L-loop squared amplitude is captured by permutation-invariant f-graphs with N+L points. By analyzing the "cusp limit" of the correlator, we establish a new double-triangle graphical rule that bootstraps f-graph...
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Dr C. Kuo01/10/2025, 11:10
The Correlahedron, introduced by Eden, Heslop, and Mason, provides a positive geometric framework for computing correlation functions in maximally supersymmetric Yang–Mills theory. In this talk, I will review the underlying geometry and present recent developments, particularly the introduction of chambers, which partition the space into regions corresponding to distinct physical...
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Dr F. Aprile01/10/2025, 12:20
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Dr T. Bargheer01/10/2025, 13:00
I will consider correlation functions of five scalar BPS
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operators in N=4 SYM theory from various perspectives, and
present recent results on their computation. -
Dr T. Hansen01/10/2025, 13:40
I will present the derivation of the AdS Virasoro-Shapiro amplitude for the scattering of gravitons in type IIA string theory on AdS4xCP3. This is achieved by combining the structure of the OPE in the AdS/CFT dual ABJM theory with an ansatz for the amplitude as a string worldsheet integral over single-valued polylogarithms. In this way we fix the first two curvature corrections, which satisfy...
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01/10/2025, 15:00
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01/10/2025, 18:00
We dine at Nolle. Nice art nouveau interior in the very heart of Mitte.
The food deal is a small starter (the same for everyone), and a main dish and a desert that you will be able to choose from a restricted menu. Iced water will be supplied. Drinks and - if you want to make them nervous, additional food - are not covered by the conference funding; the rules are unfortunately very...
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Dr R. Ruzziconi02/10/2025, 09:00
Carrollian holography suggests that gravity in (D+1)-dimensional asymptotically flat spacetime is dual to a D-dimensional Carrollian CFT living at null infinity. I will review the current status of flat space holography and explain how this picture arises from the AdS/CFT correspondence. In particular, I will show that taking the flat space limit in the bulk corresponds to a Carrollian limit...
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Dr S. Stieberger02/10/2025, 10:30
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Dr A. Lipstein02/10/2025, 11:10
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Dr A. Pokraka02/10/2025, 12:20
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Dr D. Polvara02/10/2025, 13:00
It has been known for some years that strings on AdS3 × S3 × T4 can be described by an integrable family of non-linear sigma models with two free parameters: the string tension and the ratio between Ramond-Ramond and Neveu-Schwarz-Neveu-Schwarz fluxes. After fixing a light cone gauge it is possible to describe the worldsheet fluctuations of these strings in terms of particles whose S-matrix...
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02/10/2025, 14:20
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