AdS(Algeometry, duality and Strings) seminar
Student No.:40
Time:Thu 13:30-14:30, Aug.30-Jan.17
Instructor:Song Wei, Yan Wenbin, Lin Hai, Xu Jianfei, Sun Rui  
Place:Lecture Hall, Jin Chun Yuan West Building
Starting Date:2018-8-30
Ending Date:2019-1-17


Speaker: Falk Hassler(U. of Oviedo)

Title: Poisson-Lie T-Duality in Double Field Theory

A formulation of Double Field Theory is presented which makes Poisson-Lie T-duality manifest. It allows to identify the doubled space with a Drinfeld double and provides a powerful tool to extract the transformation of the metric, B-field, dilaton and R/R potentials under Poisson-Lie T-duality.


Speaker: Prof. Dieter Luest (MPI for Physics & LMU Munich)

Title: Non-geometric fluxes and non-associativity in string/M-theory

In this talk I will discuss compactifications with geometric and non-geometric fluxes in string and in M-theory. These can be described by generalized geometry, double field theory and exceptional field theory. In particular I will discuss how non-geometric fluxes lead to a non-associative phase space structure, which is closely related to the non-associative algebra of the imaginary octonions.


Speaker: Andreas Braun (Oxford)

Title: What's new in G_2 ?

Compact manifolds with the exceptional holonomy groups G_2 and Spin(7) can be used in M-Theory to geometrically engineer theories in 4D and 3D with minimal supersymmetry. Building on new results in mathematics, we review recent progress in the construction of such geometries, the associated physics, and dualities to other string compactifications.


Speaker: Hossein Yavartanoo(ITP)

Title: H0 Tension & Swampland Conjectures

I will review some recent arguments on measuring Hubbell parameter and H0 tension. Further, borrowing from the string theory tool- kit, I will present a holographic model that relieves the tension and predicts a turning point in the Hubble parameter at small redshift. This feature is easily falsified by upcoming experiments, but is consistent with current data. I comment on the implications for the Swampland program.


Speaker: Yinan Wang(MIT)

Title: New constructions of Calabi-Yau manifolds from F-theory

In this talk, I'll present some new constructions of compact Calabi-Yau manifolds with elliptic fibration structure. In the framework of F-theory, different choices of Calabi-Yau manifolds will lead to different low energy physics after the compactification. First, I'm going to discuss the classification of elliptic Calabi-Yau threefolds, which corresponds to the classification of 6D (1,0) supergravity theories. Especially, I'm going to present a classification program of non-toric 2D base manifolds. Secondly, I'm going to talk about the geometry of elliptic Calabi-Yau fourfolds and some preliminary results of a classification program of toric 3D base manifolds. In the F-theory picture, the statistical majority of these base threefolds will give rise to exceptional gauge groups such as E8. I'll discuss its interesting physical implications on model building.


Speaker: Matthias Gaberdiel [ETH Zurich]


Speaker:Jie-qiang Wu [MIT]

Title: Quantum dynamics for Sine square deformed CFT (One example for 1+1d CFT on curved space)