Download PDF by Adam Ross Solomon (auth.): Cosmology Beyond Einstein

By Adam Ross Solomon (auth.)

ISBN-10: 3319466208

ISBN-13: 9783319466200

ISBN-10: 3319466216

ISBN-13: 9783319466217

This paintings investigates the theoretical and cosmological implications of editing Einstein's concept of basic relativity. It explores sessions of differences to gravity: these during which the graviton is given a small mass, and people during which Lorentz invariance is spontaneously damaged. It elucidates the character of cosmological perturbations in theories of huge bimetric gravity, together with a probably lethal instability. Theories of gravity past basic relativity may well clarify why the growth of the Universe is accelerating, obviating the necessity for a dismal power, and will additionally have an effect on the evolution of the early Universe. subsequent, it investigates the character of spacetime in substantial gravity theories that include varied spacetime metrics. finally, the most powerful constraints up to now are put on the dimensions of Lorentz-violating results within the gravity area in the course of inflation.

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1409 27. B. Jain, A. Joyce, R. Thompson, A. Upadhye, J. Battat, et al. Novel probes of gravity and dark energy. 5389 28. -C. A. Lim, J. Sakstein, D. Shaw, Modified gravity makes galaxies brighter. Phys. Rev. D 85, 123006 (2012). 5278 29. B. Jain, V. Vikram, J. Sakstein, Astrophysical tests of modified gravity: constraints from distance indicators in the nearby universe. Astrophys. J. 779, 39 (2013). 6044 30. J. Sakstein, Stellar oscillations in modified gravity. Phys. Rev. D 88, 124013 (2013). 0495 31.

7) The Stückelberg “Trick” Before moving on to higher orders in h μν , let us take a moment to count and classify the degrees of freedom it contains at linear order. Recall that a massless graviton contains two polarisations. Because we lose diffeomorphism invariance when we give the graviton a mass, it will contain more degrees of freedom. In fact, there are five in total. In principle, a sixth mode can arise, but it is always ghost-like and must therefore be removed from any healthy theory of massive gravity.

D 75, 063501 (2007). arXiv:hep-ph/0608078 22. P. Brax, C. -C. F. J. Shaw, Detecting chameleons through casimir force measurements. Phys. Rev. D 76, 124034 (2007). 2075 23. H. , Laboratory constraints on chameleon dark energy and power-law fields. Phys. Rev. Lett. 105, 261803 (2010). 0988 24. P. Brax, C. Burrage, Atomic precision tests and light scalar couplings. Phys. Rev. D 83, 035020 (2011). 5108 25. P. Brax, C. -C. Davis, Laboratory tests of the galileon. JCAP 1109, 020 (2011). 1573 26. C. J.

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Cosmology Beyond Einstein by Adam Ross Solomon (auth.)

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