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Alba Grassi (U)03/06/2019, 09:30
In this talk I will review a non-perturbative definition of topological string theory and discuss some of its applications.
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I will explain how this construction is related to blowup equations (see talk by Gu), the Hofstadter butterfly problem (see talk by Hatsuda) and the theory of Painlevé equations (see talks by Marshakov, Teschner and Del Monte -
Yasuyuki Hatsuda (Department of Physics, Rikkyo University)03/06/2019, 11:00
I would like to briefly review our recent works on an application of topological string theory to 2d electron system. I will explain how to generalize this idea to the case of honeycomb lattice.
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Jie Gu (University of Geneva)03/06/2019, 11:30
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Kumar Narain (ICTP)04/06/2019, 09:00
We will review the relation between Topological String Theory and the physical string couplings in the context of Type II string theories. Mapping the problem to physical string couplings allows one to study their dual heterotic theories that give rise to Schwinger like formulae for the singularity structures due to the appearance of massless BPS states. In this context we also discuss the...
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Carlo Angelantonj (Universita e INFN Torino (IT))04/06/2019, 10:30
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Piotr Sulkowski05/06/2019, 09:00
I will review a recently discovered correspondence between
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topological strings (and knots and their invariants in particular) and quiver representation theory. -
Amir-Kian Kashani-Poor05/06/2019, 10:30
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Ricardo Pina Schiappa De Carvalho (Universidade de Lisboa (PT))05/06/2019, 14:00
Perturbation theory is generically divergent, leading to series with zero radius of convergence. When such asymptotic perturbative-series are resurgent, this problem can be tackled by extending the perturbative series into a non-perturbative trans-series, in a specified fashion. Resurgent trans-series may then be used to go beyond perturbation theory in generic problems across theoretical...
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Albrecht Klemm (Institut fuer Theoretische Physik)06/06/2019, 09:00
We describe four methods to solve the topological string on elliptic Calabi-Yau manifolds and its relation to 6d SCFT.
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Murad Alim (University of Hamburg)06/06/2019, 10:30
The existence, decay and formation of BPS bound-states in N=2 theories are controlled by the central charge function through the notion of Pi-stability. In this talk I will describe the variation of the central charge over the moduli space of a given theory introducing a notion of BPS variation of Hodge structure. This description leads to exact results, giving exact descriptions of the walls...
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Stefan Hohenegger (Centre National de la Recherche Scientifique (FR))07/06/2019, 09:00
I discuss a class of little string theories (LSTs) with eight supercharges on the world-volume of N M5-branes probing a transverse Z_M orbifold. These M-brane configurations compactified on a circle are dual to M D5-branes intersecting N NS5-branes on T^2 x R^{7,1} as well as to F-theory compactified on a toric Calabi-Yau threefold X_{N,M}. I argue that the Kähler cone of X_{N,M} admits three...
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Guglielmo Lockhart07/06/2019, 10:30
I will discuss a class of 2d NLSMs which describe D3 branes wrapped on a two-sphere and probing an F-theory singularity. The chiral algebras of the NLSMs turn out to be a very useful tool. For one choice of twisting, the resulting NLSMs describe 6d instanton strings, and the chiral algebras encode BPS invariants of elliptic threefolds. A different choice of twist leads to NSLMs on minuscule...
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Andrei Marshakov (Center for Advanced Studies, Skoltech)10/06/2019, 09:00
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Fabrizio Del Monte (SISSA, Trieste)10/06/2019, 10:30
In the last few years there have been many new results connecting (linear quiver) N=2 class S theories, and the topological strings that engineeer them, to the theory of isomonodromic deformations on the sphere and their q-deformations.
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The aim of this talk is to show how this connection can be extended beyond the case of genus zero, which corresponds to circular quiver gauge theories,... -
Joerg Teschner (DESY)10/06/2019, 11:00
In joint work with I. Coman and E. Pomoni we had recently proposed a definition of the topological string
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partition functions for the local Calabi-Yau manifolds used in
the geometric engineering of N=2, d=4 class S field theories.
The main goal of my talk will be to review this proposal, and
to explain how the exact WKB method provides a crucial
ingredient. We thereby arrive at a fully... -
Yong-Geun Oh (Postec)11/06/2019, 09:00
In this talk I will first review the Lagrangian Floer theory in the general context of open-closed TFT in two dimensions and then explain its application to the mirror symmetry of compact toric manifolds. In particular, I will explain construction of a natural isomorphism between the Frobenius manifold structures of the (big) quantum cohomology of a toric manifold and of Saito's theory of...
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Calin Lazaroiu (Institute for Basic Science, Center for Geometry and Physics)11/06/2019, 10:30
I give a very brief review of the main points of my recent work on the constructive field theory of the most general class of B-type Landau-Ginzburg models, stressing the conceptually important parts while avoiding most of the mathematical details.
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Alexander Alexandrov (CGP IBS)11/06/2019, 11:00
In their recent work R. Panharipande, J. Solomon and R.
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Tessler constructed intersection theory on the moduli spaces of
Riemann surfaces with boundaries. The goal of my talk is to describe
the generating function of this theory, which is a simplest example of
the open topological string model, in terms of matrix models and
integrable hierarchies. The geometrical description of the open... -
Jake Solomon (Hebrew University)12/06/2019, 09:00
I will discuss an approach to establishing the foundations of open Gromov-Witten theory based on bounding chains and Fukaya A-infinity algebras.
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Emanuel Scheidegger (Universitaet Augsburg)12/06/2019, 10:30
We exhibit a relation between the analytic continuation of the periods of the mirror quintic to the conifold and periods and quasiperiods of a certain weight 4 Hecke eigenform associated to the mirror quintic. To explain this, we review the theory of periods of modular forms and extend it to quasiperiods.
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Jae-Suk Park (Postec)13/06/2019, 09:00
We show that there is a universal algebraic structure, closely related with that of the WDVV equation, governing quantum correlation functions of every quantum field theory based on the BV quantization scheme.
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Johanna Knapp (TU Wien)13/06/2019, 10:30
The sphere partition function of the gauged linear sigma model computes the exact metric on the Kaehler moduli space of a Calabi-Yau. We use this to test the refined swampland distance conjecture for examples of one-parameter Calabi-Yau threefolds with exotic hybrid points. This is joint work with David Erkinger.
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Thorsten Schimannek (University of Vienna)13/06/2019, 11:00
We discuss the relation between certain auto-equivalences of the category of B-branes on elliptic Calabi-Yau threefolds and modular properties of the corresponding topological string partition function.
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This suggests a geometric explanation and generalization of recent conjectures on the appearance of lattice Jacobi forms.
In particular, we will shed light on the special case where the... -
Wolfgang Lerche (CERN)14/06/2019, 09:00
I will review how matrix factorizations can be used to do computations in homological mirror symmetry and show that a crucial ingredient is a generalization of Saito's residue pairings to boundaries.
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Carlo Angelantonj (Universita e INFN Torino (IT))
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Amer Iqbal
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Simeon Hellerman (Institute for Advanced Study)
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