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Maxim Zabzine (Uppsala Univ.)6/15/26, 10:00 AM
I will briefly discuss how to incorporate the world-sheet equivariance to A and B-models and how they can
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be modified. I will discuss different features for equivariant B-model and some puzzles. -
Pietro Longhi (Uppsala Univ.)6/15/26, 11:30 AM
This talk will report on recent developments at the intersection of QFT and low-dimensional topology. WRT invariants of 3-manifolds were conjectured by Gukov-Pei-Putrov-Vafa to admit a refinement and generalization known as Z-hat invariants, motivated by 3d-3d correspondence. In following work, Gukov and Manolescu introduced a generalization of Z-hat for knot complements. By the...
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Pavlo Gavrylenko (Birmingham University)6/15/26, 2:30 PM
q-Painlevé III₃ equation is related to the N=1 5d gauge theory. We reformulate its linear problem as the Riemann-Hilbert problem on a circle. Then, we express its tau function as the Fredholm determinant related to this Riemann-Hilbert problem. This expression allows us to study the global properties of the q-Painlevé solution, and so of the partition function of the 5d gauge theory. The talk...
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Andrey Marshakov (Skoltech - Moscow)6/15/26, 4:00 PM
I consider a non-common type of 4D/2D correspondence, which allows to compute the confining spectrum of 4D supersymmetric QCD by means of 2D superconformal world-sheet theory, corresponding to N=2 supersymmetric version of 2D black hole. Amazingly enough, both Kahler and complex deformations of the world-sheet theory affect only the number of states in 4D. The conjecture survives under few...
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Alexandre Belin (Università Milano Bicocca)6/16/26, 10:00 AM
The fortuitous mechanism is a way to distinguish different type of microstates in quantum gravity. For BPS states, the question can be made sharp: fortuitous operators are the true black hole microstates and display an erratic N-dependence. A given operator built out of the fundamental fields of the theory can be BPS at some value of N, while at higher N the same operator fails to be BPS due...
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Tomas Prochazka (SEZNAM)6/16/26, 11:30 AM
I want to talk about results obtained recently with Matej Kudrna in the context of ODE/IM (or ODE/IQFT) correspondence for WN algebras. WN algebras are VOAs that are natural generalizations of Virasoro algebra. They have interesting integrable structures, in particular the quantum KP hierarchy (which generalizes the quantum KdV hierarchy in the case of Virasoro). The simultaneous eigenvalues...
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Lorenzo Ruggeri (Univ. Torino)6/16/26, 2:30 PM
Via AGT, observables of Pestun's 4d N=2 gauge theories on S^4 are known to reproduce correlators in Liouville theory. A natural question is whether a similar correspondence assigns a two-dimensional CFT to Pestun-like theories on more general compact four-manifolds. In this talk, I will answer this question affirmatively for a large class of compact toric manifolds. As a concrete example, I...
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Raoul Santachiara (LPTMS, Orsay, Paris)6/17/26, 10:00 AM
We propose a path integral definiton of a CFT that extends the imaginary Liouville theory based on a compactified boson and which provides non vanishing corrélation functions when Coulomb has neutrality condition is not satisfied.
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Aleksandr Trufanov (Université de Montréal)6/17/26, 11:30 AM
Affine Laumon spaces arise as moduli spaces of (SU(N)) instantons in the presence of a surface operator. Their equivariant cohomology was shown to form a Verma module over affine gl(n) for generic equivariant parameters. The torus fixed points provide a natural basis, which may be viewed as an affine analogue of the Gelfand--Tsetlin basis. We study a specialization of the equivariant...
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Loic Bramley (Heriott Watt University)6/17/26, 2:30 PM
Line operators in a 4d holomorphic-topological theory assemble into a meromorphic braided tensor category. Using boundary conditions, one can engineer a fibre functor on such a category, and perform categorical reconstruction to extract a vertex quantum group, for which line operators are modules. Such algebras will have the structure of a 'chiral (relative) Drinfeld double'. For 4d N=2...
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Anna Biggs (Princeton University)6/17/26, 4:00 PM
I will describe a quantum mechanical model involving N interacting fermions without disorder that has a large N melonic expansion. In particular, it has the same Schwinger-Dyson equations and low energy physics as the \mathcal{N} = 2 supersymmetric SYK model. The model is SU(2) invariant, and the supercharge involves the SU(2) 3j symbol. I will conceptually explain why the model has a melonic...
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Chiara Toldo (Université Libre de Bruxelles)6/18/26, 10:00 AM
I will review the construction of composite black hole objects in 5d via blackfolds and D-brane probes and comment on their relevance for holography. I will show how to construct novel generic Black Rings and Black Saturns in 5d Minkowski and Anti-de Sitter space, and comment on their thermodynamics and supersymmetry properties. I will also comment on the stability of wrapped D-branes on AdS5...
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Olga Papadoulaki (CPHT Paris)6/18/26, 11:30 AM
In the first part of this talk, I will present how quantum corrections stemming from the $NAdS_{2}$ region of the near extremal 4-dimensional Reissner–Nordström (RN) asymptotically AdS black brane change the behaviour of the retarded Green’s function holographically and what are the implications for the shear viscosity ($\eta$) and the bound of its ratio with the entropy density (s)...
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Maria Rodriguez (Utah State University and Madrid, IFT)6/18/26, 2:30 PM
Tidal Love numbers characterize how compact objects respond to external gravitational fields. In this talk I will discuss a machine-learning approach to compute Love numbers directly from the perturbation equations. I will present some results and comment on how this connects to more traditional approaches in black hole perturbation theory.
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Ines Aniceto (Southampton University, UK)6/18/26, 4:00 PM
In this talk I will study perturbations of Yang-Mills plasma, represented by scalar quasi-
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normal modes of AdS black branes, as functions of the wave number q . This will be done using a combination of Seiberg-Witten and exact WKB approaches. The instanton expansion naturally provides an analytic understanding of the validity of the classical spectral methods based on the truncation of the... -
Luca Griguolo (Univ. Parma)6/19/26, 10:00 AM
This talk explores the fate of the "confining" N=4 flux tube in the presence of a large R-charge.
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Using the AdS/CFT correspondence, we examine how inserting this charge induces a non-analytic transition.
The flux tube loses its standard configuration, evolving into a highly excited, "deconfined" state.
We map this regime to the BMN limit and integrable open spin chains with reflecting... -
Tomoki Nosaka (SIMIS)6/19/26, 11:30 AM
We study the finite dimensional integrals which calculate the sphere partition function of the theories of N M2-branes, which we shall call M2-matrix models. M2-matrix models has been studied in detail in particular for the U(N)k x U(N+M){-k} ABJ(M) theory, where it was found that the generating function of the matrix models obey the Hirota bilinear form of the q-discrete Painleve III_3...
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6/19/26, 12:30 PM
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Domenico Seminara (Univ. Firenze)
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