Triangle Seminars
Monday, 14 Nov 2016
Black holes and exotic branes in string theory
Masaki Shigemori
(QMUL)
Abstract:
PhD Lecture 1: String theory and branes: We will review the extended objects in string theory and the duality transformations relating them
PhD Lecture 1: String theory and branes: We will review the extended objects in string theory and the duality transformations relating them
Posted by: QMW
Tuesday, 15 Nov 2016
Black holes and exotic branes in string theory
Masaki Shigemori
(QMUL)
Abstract:
PhD Lecture 2: Supergravity solutions: We will discuss the supergravity solutions representing various brane configurations and see how the duality transformations are manifested in them.
PhD Lecture 2: Supergravity solutions: We will discuss the supergravity solutions representing various brane configurations and see how the duality transformations are manifested in them.
Posted by: QMW
Wednesday, 16 Nov 2016
Vertex operator algebras from four-dimensional SCFTs
📍 London
Christopher Beem
(Oxford University)
Abstract:
I will review the recently exposed connection between N=2 superconformal field theories in four dimensions and vertex operator algebras (VOAs). I will outline some general features of the VOAs that arise in this manner and describe the manner in which they reflect four-dimensional operations such as gauging and Higgsing. Time permitting, I will also touch on the modular properties of characters of these VOAs.
I will review the recently exposed connection between N=2 superconformal field theories in four dimensions and vertex operator algebras (VOAs). I will outline some general features of the VOAs that arise in this manner and describe the manner in which they reflect four-dimensional operations such as gauging and Higgsing. Time permitting, I will also touch on the modular properties of characters of these VOAs.
Posted by: KCL
Polygon Seminar: Boundaries, Modules and Symplectic Duality
Mathew Bullimore
(Oxford)
Abstract:
I will discuss connections between supersymmetric gauge theories in three dimensions and an exciting development in representation theory known as symplectic duality. I will focus on the simplest example of this phenomenon, which arises from a U(1) gauge theory with N hypermultiplets.
I will discuss connections between supersymmetric gauge theories in three dimensions and an exciting development in representation theory known as symplectic duality. I will focus on the simplest example of this phenomenon, which arises from a U(1) gauge theory with N hypermultiplets.
Posted by: IC
Thursday, 17 Nov 2016
Recent Advances in Heterotic Moduli
Eirik Eik Svanes
(Paris, LPTHE)
Abstract:
I will discuss recent advances in addressing the heterotic moduli problem in six and seven dimensions. To map out the reduction to a lower dimensional effective theory, and in a quest to complete our understanding of the generically torsional geometries that appear, it is important to understand the moduli of these geometries. I will briefly review the infinitesimal moduli space in six dimensions, and comment on some recent advances in understanding its geometric properties. I will then explain how a similar story is emerging in seven dimensional compactifications on more exotic manifolds with G2-structure, giving hope that similar tools can be applied to understand moduli in other areas of string theory, with possible applications to phenomenology and AdS/CFT. If time, I will comment on some recent advances is studying finite deformations and obstructions of the moduli space.
I will discuss recent advances in addressing the heterotic moduli problem in six and seven dimensions. To map out the reduction to a lower dimensional effective theory, and in a quest to complete our understanding of the generically torsional geometries that appear, it is important to understand the moduli of these geometries. I will briefly review the infinitesimal moduli space in six dimensions, and comment on some recent advances in understanding its geometric properties. I will then explain how a similar story is emerging in seven dimensional compactifications on more exotic manifolds with G2-structure, giving hope that similar tools can be applied to understand moduli in other areas of string theory, with possible applications to phenomenology and AdS/CFT. If time, I will comment on some recent advances is studying finite deformations and obstructions of the moduli space.
Posted by: IC
Exotic objects from Double Field Theory
Edvard Musaev
(AEI Potsdam)
Abstract:
T-duality is known to generate exotic objects, which cannot be consistently described in terms of conventional supergravity. In the focus of this talk are backgrounds of DFT carrying Q or R fluxes, which are non-commutative and non-associative in the conventional description. We show that the Berman-Rudolph's DFT-monopole solution which unifies the backgrounds of NS5-brane and KK-monopole also describes these exotic backgrounds upon a choice of section condition. The resulting Q- and R-monopoles no longer have non-trivial monodromies and the only sign of non-geometry is a non-trivial dependence of the fields on dual (winding) coordinates.
based on 1607.05450
T-duality is known to generate exotic objects, which cannot be consistently described in terms of conventional supergravity. In the focus of this talk are backgrounds of DFT carrying Q or R fluxes, which are non-commutative and non-associative in the conventional description. We show that the Berman-Rudolph's DFT-monopole solution which unifies the backgrounds of NS5-brane and KK-monopole also describes these exotic backgrounds upon a choice of section condition. The resulting Q- and R-monopoles no longer have non-trivial monodromies and the only sign of non-geometry is a non-trivial dependence of the fields on dual (winding) coordinates.
based on 1607.05450
Posted by: QMW