65 citations · 191 across the 5 of their papers we have counts for
5 papers
Higher Powers in Gravitation
Timothy Clifton
We consider the Friedmann-Robertson-Walker cosmologies of theories of gravity that generalise the Einstein-Hilbert action by replacing the Ricci scalar, R, with some function, f(R)…
Properties of Black Hole Radiation From Tunnelling
Timothy Clifton
We consider the space-time associated with the evaporation of a black hole by quantum mechanical tunnelling events. It is shown that the surface through which tunnelling occurs is…
The Parameterised Post-Newtonian Limit of Fourth-Order Theories of Gravity
Timothy Clifton
We determine the full post-Newtonian limit of theories of gravity that extend general relativity by replacing the Ricci scalar, R, in the generating Lagrangian by some analytic fun…
Volume Weighted Measures of Eternal Inflation in the Bousso-Polchinski Landscape
Timothy Clifton, Stephen Shenker, Navin Sivanandam
We consider the cosmological dynamics associated with volume weighted measures of eternal inflation, in the Bousso-Polchinski model of the string theory landscape. We find that thi…
The Ups and Downs of Cyclic Universes
T. Clifton, John D. Barrow
We investigate homogeneous and isotropic oscillating cosmologies with multiple fluid components. Transfer of energy between these fluids is included in order to model the effects o…