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Now showing items 21-26 of 26
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
Cosmological perturbations due to statistical thermal fluctuations in a single fluid characterized by an arbitrary equation of state are computed. Formulas to predict the scalar and tensor perturbation spectra and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
In the first-order formalism of gravitational theories, the spacetime connection is considered as an independent variable to vary together with the metric. However, the metric still generates its Levi-Civita connection ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
The space-time evolution of an initial step-like plasma density variation is studied. We give particular attention to formulate the problem in a way that opens for the possibility of realizing the conditions experimentally. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
Several extensions of general relativity and high energy physics include scalar fields as extra degrees of freedom. In the search for predictions in the nonlinear regime of cosmological evolution, the community makes use ...
(Master thesis / Masteroppgave, 2013)
The existence of dark energy in the universe is hypothesized to explain the accelerated expansion of today’s universe and the inflationary expansion of very early universe; accelerated expansion of today’s universe is ...
(Doctoral thesis / Doktoravhandling, 2013)