Constraining holographic cosmology with Planck data
Семинары
Семинар «Современная математическая физика»
Дата и время: вторник, 5 июня 2018 г., в 14:30
Место: Конференц-зал им. Блохинцева (4-й этаж), Лаборатория теоретической физики им. Н.Н. Боголюбова
Тема семинара: «Constraining holographic cosmology with Planck data»
Докладчик: Elizabeth Gould (School of Physics and Astronomy, University of Southampton)
Аннотация:
The holographic cosmology framework exploits holographic dualities in order to express inflationary predictions in terms of the observables of a 3D quantum field theory (QFT). If the dual QFT is strongly coupled this framework reproduces standard inflationary predictions, in particular the power spectra of primordial curvature perturbations are well approximated by the standard power law expansion, while in the opposite case of dual QFT being perturbative one obtains a new holographic expansion. We compare the two cases against the state of the art cosmological observations and show that they do equally well at l>30, where a holographic perturbative expansion can be trusted. In order to compare the model to the data for low l values, we are currently developing lattice simulations of holographic cosmology in order to model the low-l non-perturbative regime.