PhD project: Holographic cosmological models
The recent work arXiv:1607.04878 showed that a holographic description of the early Universe allows one to obtain novel cosmological models, which are competitive with the more standard ΛCDM model. In this new model, the Cosmic Microwave Background (CMB) spectrum is related to the 2-point function of the trace of the energy-momentum tensor in the dual theory. The fit to data suggests that the dual theory is a gauge theory coupled to scalar fields with a quartic interaction, which while perturbative at high momenta, it becomes non-perturbative at low momenta (low-multipole part of the CMB spectrum). Moreover, the dual theory suffers from severe infrared divergences in perturbation theory, which are believed to be only an artefact of perturbation theory. In this project, we propose to address both issues by computing the relevant 2-point functions in dual theory using fully non-perturbative lattice simulations.
The project supervisors welcome informal enquiries about this project.
Find out more about this research area
The links below summarise our research in the area(s) relevant to this project:
- Find out more about Fundamental Theory.
- Find out more about Lattice Gauge Theory.
- Find out more about Particle Physics Theory.
- Find out more about the Institute for Particle and Nuclear Physics.
- Find out how to apply for our PhD degrees.
- Find out about fees and funding and studentship opportunities.
- View and complete the application form (on the main University website).
- Find out how to contact us for more information.