UK-QFT XI

Session

Talks

9 Jan 2023, 13:50

Cambridge Centre for Mathematical Sciences (University of Cambridge)

20. NEC violation: Tunnelling versus Casimir effect

Drew Backhouse

09/01/2023, 13:50

Talk

Tunneling between degenerate vacua is allowed in a finite volume, and leads to a non-extensive symmetric ground state. This talk displays how this leads to a violation of the Null Energy Condition for small enough temperatures, assuming a continuous set of momenta in the finite volume containing the field. Taking into account discrete momenta can modify this picture, and is achieved by adding...

19. Scale separation in AdS vacua and holography

Fien Apers (University of Oxford)

09/01/2023, 14:15

Talk

The existence of AdS vacua in string theory with a parametric separation between the Hubble scale and the Kaluza-Klein scale of the extra dimensions is an open question, and holography is a promising tool to tackle this. I will discuss some remarkable features of the holographic CFT duals of the DGKT vacua, which are candidate AdS vacua with parametric scale separation.

18. A dynamical formulation of ghost-free massive gravity

Jan Kożuszek

09/01/2023, 14:40

Talk

The ghost-free massive gravity theory of de Rham, Gabadadze and Tolley (dRGT) has attracted a lot of attention since its formulation over a decade ago. Many studies have looked at its consequences for cosmology, and explored various limits in which the theory simplifies. However, until now few attempts have been made at numerically simulating its full non-linear equations, as an explicit...

11. Integrability treatment of AdS/CFT orbifolds

Torben Skrzypek (Imperial College London)

09/01/2023, 15:05

The integrability program provides powerful tools to determine the spectrum of holographic theories. The development of these tools and the generalisation to a wider scope of theories go hand in hand. In particular, non-supersymmetric versions of AdS/CFT can be accessed, which is a first step towards more realistic models of QCD and could shed some light on SUSY-breaking mechanisms needed for...