Publications

BibTex format

@article{Magueijo:2018:10.1103/PhysRevD.97.043512,
author = {Magueijo, JCR},
doi = {10.1103/PhysRevD.97.043512},
journal = {Physical Review D - Particles, Fields, Gravitation and Cosmology},
title = {Solving the flatness problem with an anisotropic instanton in Hoava-Lifshitz gravity},
url = {http://dx.doi.org/10.1103/PhysRevD.97.043512},
volume = {97},
year = {2018}
}

Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In Hoava-Lifshitz gravity a scaling isotropic in space but anisotropic in spacetime, often called “anisotropic scaling,” with the dynamical critical exponent z=3, lies at the base of its renormalizability. This scaling also leads to a novel mechanism of generating scale-invariant cosmological perturbations, solving the horizon problem without inflation. In this paper we propose a possible solution to the flatness problem, in which we assume that the initial condition of the Universe is set by a small instanton respecting the same scaling. We argue that the mechanism may be more general than the concrete model presented here. We rely simply on the deformed dispersion relations of the theory, and on equipartition of the various forms of energy at the starting point.
AU  - Magueijo,JCR
DO  - 10.1103/PhysRevD.97.043512
PY  - 2018///
SN  - 1550-2368
TI  - Solving the flatness problem with an anisotropic instanton in Hoava-Lifshitz gravity
T2  - Physical Review D - Particles, Fields, Gravitation and Cosmology
UR  - http://dx.doi.org/10.1103/PhysRevD.97.043512
UR  - http://hdl.handle.net/10044/1/57260
VL  - 97
ER  -

Download

Prof Joao Magueijo

Contact

Location

Summary

Citation

BibTex format

RIS format (EndNote, RefMan)