TitleGeneralized perturbations in modified gravity and dark energy
Author(s)Jonathan Pearson
Description1 online resource (xix, 200 pages) : illustrations (some color)
Abstract NoteWhen predictions of Einstein's theory of General Relativity are compared against observations of our Universe, a huge inconsistency is found. The most popular fix for this inconsistency is to "invent" around 94% of the content of the universe: dark matter and dark energy. The dark energy is some exotic substance responsible for the apparent observed acceleration of the Universe. Another fix is to modify the theory of gravity: it is entirely plausible that Einstein's theory of General Relativity breaks down on cosmological scales, just as Newton's theory of gravity breaks down in the extreme gravitational field of the Sun. There are many alternative theories of gravity, each with the aim of describing observations of our Universe where General Relativity fails. Whether it is dark energy or some modified theory of gravity, it is clear that there is some "dark sector" in the Universe. In this thesis the author constructs a unifying framework for understanding the observational impact of general classes of dark sector theories, by formulating equations of state for the dark sector perturbations
Contents NoteGravitational theories and cosmology -- The effective action formalism for cosmological perturbations -- Metric only and first order scalar field theory -- High derivative theories -- Explicit theories -- Connections to massive gravity -- Generalized fluid description -- Observational signatures of generalized cosmological perturbations -- Discussion and final remarks
NotesIncludes bibliographical references
Keyword(s)1. Classical and Quantum Gravitation, Relativity Theory 2. COSMOLOGY 3. Dark energy (Astronomy) 4. EBOOK 5. EBOOK - SPRINGER 6. GENERAL RELATIVITY (PHYSICS) 7. GRAVITATION 8. Mathematical Applications in the Physical Sciences 9. PERTURBATION (ASTRONOMY) 10. PHYSICS 11. SCIENCE / Astronomy
Item TypeeBook
Multi-Media Links
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Circulation Data
Accession#  Call#StatusIssued ToReturn Due On Physical Location
I02376     On Shelf