Thesis Open Access

Cosmological closure of metric and area-metric ideal fluids

Nils Leif Fischer

Thesis supervisor(s)

Schäfer, Björn Malte; Schuller, Frederic Paul

To shed some light on the construction of physically viable gravity theories, I employ the gravitational closure framework to investigate a cosmology that is not a priori based on a metric but assumes an area-metric spacetime geometry that arises from the most general linear theory of electrodynamics. To this end, I develop a symmetry reduction procedure to find, for the first time, an exact non-metric solution of the gravitational closure framework under cosmological symmetries. I investigate cosmological sources of gravity and construct an area-metric description of ideal fluids. I conclude by illustrating that, even though we cannot rely on metric concepts such as a metric line-element or a Levi-Civita connection to begin with, we can recover all required notions, such as light rays and observers, that allow us to conduct cosmological observations.

Master thesis
Files (960.5 kB)
Name Size
nilsleiffischer/msc-thesis-v1.0.0.zip
md5:b3f434b5db9e8d8a6df054ea2adbcd61
960.5 kB Download
107
7
views
downloads
All versions This version
Views 107107
Downloads 77
Data volume 6.7 MB6.7 MB
Unique views 103103
Unique downloads 77

Share

Cite as