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A Simple Model for Pulse Profiles from Precessing Pulsars, with Special Application to Relativistic Binary PSR B1913+16
Timothy Clifton, Joel M. Weisberg
We study the observable pulse profiles that can be generated from precessing pulsars. A novel coordinate system is defined to aid visualization of the observing geometry. Using thi…
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…
Exact Friedmann Solutions in Higher-Order Gravity Theories
Timothy Clifton
We find the general behaviour of homogeneous and isotropic cosmological models in some fourth-order theories of gravity. Explicit, exact, general solutions are given for both empty…
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…
Islands in the landscape
T. Clifton, Andrei Linde, Navin Sivanandam
The string theory landscape consists of many metastable de Sitter vacua, populated by eternal inflation. Tunneling between these vacua gives rise to a dynamical system, which asymp…