Name: String Geometry in Stavanger
Start: 2022-08-10T08:45:00+02:00
End: 2022-08-12T20:30:00+02:00
Location: University of Stavanger

String Geometry in Stavanger

from Wednesday, 10 August 2022 (08:45) to Friday, 12 August 2022 (20:30)

Monday, 8 August 2022
Tuesday, 9 August 2022
Wednesday, 10 August 2022

09:00 Target Space Geometry for Topological Strings - Charles Strickland-Constable (University of Hertfordshire)
Target Space Geometry for Topological Strings - Charles Strickland-Constable (University of Hertfordshire)
09:00 - 10:00
Room: Kjølv Egelands Hus, room E-102 Using generalised geometry, I will describe a universal construction of a double complex on supersymmetric NS-NS backgrounds which provides a geometric realisation of the BRST complex of twisted string sigma models. It will also be shown how to write the 1-loop partition function in terms of these objects. For the case of G2 manifolds, I will show how this leads to a target space action which reproduces the 1-loop partition function.

10:00 Refreshments
Refreshments
10:00 - 10:30
Room: Kjølv Egelands Hus, room E-102

10:30 Carrollian gravity from the gauging procedure - José Figueroa-O'Farrill (The University of Edinburgh)
Carrollian gravity from the gauging procedure - José Figueroa-O'Farrill (The University of Edinburgh)
10:30 - 11:30
Room: Kjølv Egelands Hus, room E-102 I will report on recent work with Emil Have, Stefan Prohazka and Jakob Salzer where we rephrase the gauging procedure in terms of Cartan geometry and apply it to derive carrollian theories of gravity. I will concentrate on two examples of what could be mis-labelled “gauging the Poincaré algebra”: the classic derivation of GR in the first-order formalism and a novel derivation of a version of carrollian gravity.

11:30 Lunch
Lunch
11:30 - 14:30

14:30 Twisting with a Flip - Guido Festuccia (Uppsala University)
Twisting with a Flip - Guido Festuccia (Uppsala University)
14:30 - 15:30
Room: Kjølv Egelands Hus, room E-102 I will consider N=2 supersymmetric gauge theories on 4D compact manifolds with a Killing vector field with isolated fixed points. Studying the realization of supersymmetry in these theories leads to consider a generalization of the notion of self-duality allowing to construct a framework unifying equivariant Donaldson-Witten theory and Pestun's theory on S4 and its generalizations. By dimensional reduction this framework allows us also to reformulate N=2,2 supersymmetric theories on compact two manifolds. -------------------------- Join Zoom Meeting https://stavanger.zoom.us/j/69012564647?pwd=cjBVQXBJcXM1WEFNcWFQZ1Erd3lVQT09 Meeting ID: 690 1256 4647 Password: 854146

15:30 Refreshments
Refreshments
15:30 - 16:00
Room: Kjølv Egelands Hus, room E-102
Thursday, 11 August 2022

09:00 Heterotic Systems: Geometry and Moduli - Xenia de la Ossa (University of Oxford)
Heterotic Systems: Geometry and Moduli - Xenia de la Ossa (University of Oxford)
09:00 - 10:00
Room: Kjølv Egelands Hus, room E-102 Abstract tba

10:00 Refreshments
Refreshments
10:00 - 10:30
Room: Kjølv Egelands Hus, room E-102

10:30 A non-Lorentzian Approach to non-Lagrangian CFT's - Neil Lambert (King's College London)
A non-Lorentzian Approach to non-Lagrangian CFT's - Neil Lambert (King's College London)
10:30 - 11:30
Room: Kjølv Egelands Hus, room E-102 We discuss interacting five-dimensional gauge theories with an OSp(6|4) symmetry group - same as ABJM - but with the role of spacetime and R-symmetries interchanged. These are obtained by a conformal compactification of six-dimensional SCFT’s and admit towers of Omega-deformed instantons that reproduce the KK spectrum. The SU(1,3) spacetime symmetry places interesting constraints on the correlation functions which can be used to reconstruct the six-dimensional correlators. In the limit that the Omega-deformation is turned off one recovers the standard DLCQ construction and associated Schrodinger Symmetry.

11:30 Lunch
Lunch
11:30 - 14:30

14:30 K3 Degeneration, Orientifolds and Duality - Chris Hull (Imperial College London)
K3 Degeneration, Orientifolds and Duality - Chris Hull (Imperial College London)
14:30 - 15:30
Room: Kjølv Egelands Hus, room E-102 Abstract tba

15:30 Refreshments
Refreshments
15:30 - 16:00
Room: Kjølv Egelands Hus, room E-102

17:00 Dinner
Dinner
17:00 - 19:30
Room: Fisketorget
Friday, 12 August 2022

09:00 Heterotic Strings on T3/Z2, Nikulin involutions and M-theory - Ida Zadeh (ICTP, Trieste)
Heterotic Strings on T3/Z2, Nikulin involutions and M-theory - Ida Zadeh (ICTP, Trieste)
09:00 - 10:00
Room: Kjølv Egelands Hus, room E-102 I will discuss compactification of the heterotic string on the smooth, flat 3-manifold T3/Z2, without supersymmetry. The low energy dynamics of the corresponding ten-dimensional heterotic supergravity will be described. The semi-classical theory has both Coulomb and Higgs branches of non-supersymmetric vacua. An exact worldsheet description of the compactification will then be presented using the framework of asymmetric orbifolds of T3 , where the orbifold generator involves a Nikulin non-symplectic involution of the even self-dual lattice of signature (19,3). This construction gives a novel conformal field theory description of the semi-classical field theory moduli space and reveals a rich pattern of transitions amongst Higgs and Coulomb branches. ----------------------------------------------------- Join Zoom Meeting https://stavanger.zoom.us/j/63647494163?pwd=ZzNQWVl4dlhaMGRtbktRZUN1dElaQT09 Meeting ID: 636 4749 4163 Password: 165388

10:00 Refreshments
Refreshments
10:00 - 10:30
Room: Kjølv Egelands Hus, room E-102

10:30 Black Holes, Attractor Points and Arithmetic - Philip Candelas (University of Oxford)
Black Holes, Attractor Points and Arithmetic - Philip Candelas (University of Oxford)
10:30 - 11:30
Room: Kjølv Egelands Hus, room E-102 I will give an explicit description of a Calabi-Yau threefold which becomes, for certain values of the parameter, an attractor variety of rank 2. The periods of this variety have remarkable number-theoretic properties which will be reviewed. This reports on joint work with X de la Ossa, Mohamed Elmi and Duco van Straten, and earlier work with Xenia de la Ossa and Duco van Straten.

11:30 Lunch
Lunch
11:30 - 14:30

14:30 Reflections on Mirror Symmetry - Colloquium by Xenia de la Ossa (University of Oxford)
Reflections on Mirror Symmetry - Colloquium by Xenia de la Ossa (University of Oxford)
14:30 - 15:30
Room: Kjølv Egelands Hus, room E-102 A historical introduction to counting rational curves in Calabi Yau manifolds