Integrability, duality and beyond

Session

Seminar

3 Jun 2019, 10:30

Rooms: 5, 7, 130 and 140 (Facultade de Física, Universidade de Santiago de Compostela)

6. Yang-Baxter deformations of the AdS3 string as marginal deformations of the WZW-model

Linus Wulff (Masaryk University of Brno)

03/06/2019, 10:30

The Yang-Baxter deformations of the (bosonic) AdS3xS3 string will be classified and shown to correspond, via a field redefinition, to marginal current-current deformations of the WZW-model.

13. The Many Facets of Poisson-Lie T-duality

Falk Hassler (University of Oviedo)

03/06/2019, 12:00

Poisson-Lie T-duality was originally introduced to identify
the dynamics of closed strings probing different target spaces. But nowadays it also has become a crucial ingredient in the construction of integrable, two-dimensional sigma-models. After reviewing this intriguing connection from a worldsheet perspective, I will switch to the target space. There we are going to see that Poisson-Lie...

7. Double and exceptional field theory

David Berman (Queen Mary University of London)

03/06/2019, 15:00

1. Aspects of gauge-strings duality

Carlos Nuñez (Swansea University)

03/06/2019, 16:30

We discuss some recent developments in the duality between gauge fields and strings. In particular, focusing on conformal field theories in diverse dimensions and with different amounts of supersymmetry, we comment on their string duals, the calculation of various physical observables and the possibility of finding classical integrability on the dual string wolrdsheet.

3. Integrable deformations of the AdS5 x S5 superstring: resolving some puzzles

Ben Hoare (ETH Zurich)

04/06/2019, 10:30

Recent explorations of the AdS5 x S5 superstring and its integrable deformations have greatly improved our understanding of integrable string sigma models. However, they have also led to a number of puzzles. In this talk we will focus on two particular deformations, the eta and lambda deformations, and their Poisson-Lie duals. In these models the symmetry algebra is q-deformed. We will review...

11. Integrable 2d sigma models: RG flow and deformations

Arkady Tseytlin (Imperial College London)

04/06/2019, 12:00

I will discuss some examples of deformations of 2d metrics under
RG flow. Based on on-going work with Ben Hoare and Nat Levine.

8. Exploring the landscape of eta-deformed AdS superstrings

Fiona Seibold (ETH Zurich)

04/06/2019, 15:00

I will focus on integrable eta deformations of AdS superstrings with the deformation encoded in an operator R satisfying the modified classical Yang-Baxter deformation. Such R-matrices include those of Drinfel'd-Jimbo type, whose action is dictated by the choice of Dynkin diagram and associated Cartan-Weyl basis. Superalgebras admit inequivalent Dynkin diagrams and thus allow for different...

9. T-duality equivalences beyond string theory

Alejandro Vilar López (IGFAE (Santiago de Compostela))

04/06/2019, 15:45

It is a known fact that the leading order low-energy effective action of string theory is symmetric under T-duality transformations (Buscher rules), and although these are such that geometric properties of solutions may change substantially they still preserve the Hawking temperature and entropy of black holes. The question naturally arises whether or not this holds when one includes...

10. Spin-2 excitations in Gaiotto-Maldacena solutions

José Manuel Penín Ascariz (IGFAE (Santiago de Compostela))

04/06/2019, 17:00

In this talk, I will present the results for the computation of the spin-2 excitations for a class of N=2 supersymmetric solutions of type IIA supergravity found by Gaiotto and Maldacena. The mass spectrum of these excitations can be derived by solving a second order partial differential equation. In our work, we consider as specific exampkes the Abelian and non-Abelian T-dual versions of...

4. Quantum info from symmetry, geometry and the effective action

Kostas Sfetsos (University of Athens)

05/06/2019, 10:30

A well known gauging procedure allowed for the systematic construction of exact deformations of current algebra theories with large classes of them being integrable. We present a modification of this construction allowing for the determination of the anomalous dimension of arbitrary composite operators in these theories exactly in the deformation couplings. In our approach loop computations...

2. From 1 to N

Marc Magro (ENS Lyon)

05/06/2019, 12:00

I shall first review the interpretation of integrable sigma-models as realizations of affine Gaudin models. It will then be explained how to obtain new classical integrable field theories by assembling two affine Gaudin models into a single one. Finally, the application of this method to couple together an arbitrary number of principal chiral model fields on the same Lie group, each with a...

5. Exceptional Geometry of supersymmetric AdS vacua and their consistent truncations

Emanuel Malek (AEI Potsdam)

05/06/2019, 15:00

I will show how exceptional field theory (ExFT) can be used to construct supersymmetric AdS vacua of 10-/11-d SUGRA and their consistent truncations. I will focus on the class of infinitely-many supersymmetric AdS_7 vacua of massive IIA and AdS_6 vacua of IIB and show how ExFT immediately leads to the "minimal" consistent truncation around these vacua in which only the gravitational...

12. Integrable deformations and Generalised Dualities

Dan Thompson (Swansea University)

05/06/2019, 16:30

I will outline some recent progress in understanding classes of integrable deformations of strings relevant to e.g. the AdS_5 x S^5 superstring. These so-called eta and lambda-deformations exhibit a rich structure of Poisson-Lie symmetries and corresponding notions of Poisson-Lie and non-Abelian T-duality. I will explain how these symmetries become natural when harnessing the power of...