Silvia Georgescu

 

PhD Student

Research group: String Theory

Thesis:

"Holography beyond AdS"
Advisor: Emilian Dudas et Monica Guica (IPhT CEA Saclay)

Abstract :

Since a couple of years, an ambitious program called "swampland" propose to identify the constraints on quantum field theories and gauge theories, coming from their coupling to gravity. A quantum field or gauge theory is said to belong to the swampland if it looks completely consistent from the usual consistency rules viewpoint, but cannot be obtained from a string theory or, more generally, coupled to a quantum theory of gravitation. Several conjectures were formulated in this respect, with arguments of different degrees of levels of rigor. The main goal of the swampland program is to identify new constraints on the extensions of the Standard Model of fundamental interactions, coming from their coupling to quantum gravity. The majority of arguments and examples considered in the literature are supersymmetric models based on extended supersymmetry, which do not allow to define chiral fermions. Hence, one of the goals of this thesis is to test some of these conjectures in the case where supersymmetry is minimal, which allows the definition of chiral fermions. Another aim is to identify and study the theories where supersymmetry is completely broken and to modify the conjectures in the case with no supersymmetry.

 

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