The 37th International Symposium on Lattice Field Theory (Lattice 2019)

16-22 June 2019
Asia/Shanghai timezone

Towards a holographic description of cosmology (II): Renormalisation of the 3D SU(N) scalar energy-momentum tensor

19 Jun 2019, 09:20
20m
Shimao 3B

Shimao 3B

Parallel Physics Beyond the Standard Model

Speaker

Mr Joseph Lee (University of Edinburgh)

Description

In holographic cosmology, cosmological observables are described in terms of correlators of a three-dimensional boundary quantum field theory. In this talk, we study the renormalisation of the energy-momentum tensor 2 point function for 3D massless $SU(N)$ scalar matrix field theory. We present a non-perturbative procedure to remove divergences resulting from the loss of translational invariance on the lattice, by imposing Ward identities. This will allow us to make non-perturbative predictions for the CMB power spectrum at low multipoles, assuming the holographic theory describing the very early Universe is the 3D massless $SU(N)$ scalar matrix field theory.

Primary author

Mr Joseph Lee (University of Edinburgh)