827 citations · 16k across the 208 of their papers we have counts for
7 papers · 1 filter
Intermediate inflation from rainbow gravity
John D. Barrow, Joao Magueijo
It is possible to dualize theories based on deformed dispersion relations and Einstein gravity so as to map them into theories with trivial dispersion relations and rainbow gravity…
Inflationary Instabilities of Einstein-Aether Cosmology
Adam R. Solomon, John D. Barrow
We examine the consequences of Lorentz violation during slow-roll inflation. We consider a canonical scalar inflaton coupled, through its potential, to the divergence of a fixed-no…
Geodesics at Sudden Singularities
John D. Barrow, S. Cotsakis
We show that a general solution of the Einstein equations that describes approach to an inhomogeneous and anisotropic sudden spacetime singularity does not experience geodesic inco…
General Dynamics of Varying-Alpha Universes
John D. Barrow, Alexander A. H. Graham
We introduce and study extensions of the varying alpha theory of Bekenstein-Sandvik-Barrow-Magueijo to allow for an arbitrary coupling function and self-interaction potential term…
Limits on the dependence of the fine-structure constant on gravitational potential from white-dwarf spectra
J. C. Berengut, V. V. Flambaum, A. Ong +5
We propose a new probe of the dependence of the fine structure constant, alpha, on a strong gravitational field using metal lines in the spectra of white dwarf stars. Comparison of…
Bouncing Anisotropic Universes with Varying Constants
John D. Barrow, David Sloan
We examine the evolution of a closed, homogeneous and anisotropic cosmology subject to a variation of the fine structure 'constant', α, within the context of the theory introduced…