ENGLISH

Cosmology Beyond Einstein

By Adam Ross Solomon (auth.)

Book information

Publisher
Springer International Publishing
Year
2017
ISBN
978-3-319-46621-7, 978-3-319-46620-0
DOI
10.1007/978-3-319-46621-7
Language
english
Format
PDF
Filesize
4 MB (4163567 bytes)
Series
Springer Theses
Edition
1
Pages
XXI, 231\239
Time added
2016-12-08 02:00:00
Cosmology;Classical and Quantum GravitationRelativity Theory;Particle and Nuclear Physics

Description

This work investigates the theoretical and cosmological implications of modifying Einstein's theory of general relativity. It explores two classes of modifications to gravity: those in which the graviton is given a small mass, and those in which Lorentz invariance is spontaneously broken. It elucidates the nature of cosmological perturbations in theories of massive bimetric gravity, including a potentially deadly instability. Theories of gravity beyond general relativity could explain why the expansion of the Universe is accelerating, obviating the need for a dark energy, and can also affect the evolution of the early Universe. Next, it investigates the nature of spacetime in massive gravity theories that contain two different spacetime metrics. Lastly, the strongest constraints to date are placed on the size of Lorentz-violating effects in the gravity sector during inflation.

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