Imperial College London
Alternate

Prof Joao Magueijo

Faculty of Natural Sciences, Department of Physics

Professor of Physics
 
 
 
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Contact

 

j.magueijo Website

 
 
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Location

 

Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Brighenti:2017:10.1103/PhysRevD.95.063534,
author = {Brighenti, F and Gubitosi, G and Magueijo, J},
doi = {10.1103/PhysRevD.95.063534},
journal = {Physical Review D},
title = {Primordial perturbations in a rainbow universe with running Newton constant},
url = {http://dx.doi.org/10.1103/PhysRevD.95.063534},
volume = {95},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - e compute the spectral index of primordial perturbations in a rainbow universe. We allow the Newton constant G to run at (super-) Planckian energies and we consider both vacuum and thermal perturbations. If the rainbow metric is the one associated to a generalized Horava-Lifshitz dispersion relation, we find that only when G tends asymptotically to 0 can one match the observed value of the spectral index and solve the horizon problem, both for vacuum and thermal perturbations. For vacuum fluctuations the observational constraints imply that the primordial universe expansion can be both accelerating or decelerating, while in the case of thermal perturbations only decelerating expansion is allowed.
AU  - Brighenti,F
AU  - Gubitosi,G
AU  - Magueijo,J
DO  - 10.1103/PhysRevD.95.063534
PY  - 2017///
SN  - 2470-0010
TI  - Primordial perturbations in a rainbow universe with running Newton constant
T2  - Physical Review D
UR  - http://dx.doi.org/10.1103/PhysRevD.95.063534
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000399147100006&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/54233
VL  - 95
ER  -
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