89 citations · 314 across the 7 of their papers we have counts for
7 papers
Thermal Inflation with a Thermal Waterfall Scalar Field Coupled to a Light Spectator Scalar Field
Konstantinos Dimopoulos, David H. Lyth, Arron Rumsey
A new model of thermal inflation is introduced, in which the mass of the thermal waterfall field is dependent on a light spectator scalar field. Using the formalism, the "end…
Non-gaussianity at tree and one-loop levels from vector field perturbations
Cesar A. Valenzuela-Toledo, Yeinzon Rodriguez, David H. Lyth
We study the spectrum P_ζand bispectrum B_ζof the primordial curvature perturbation ζwhen the latter is generated by scalar and vector field perturbations. The tree-level and one-l…
Super-horizon perturbations and preheating
Andrew R. Liddle, David H. Lyth, Karim A. Malik +1
It has recently been claimed by Bassett et al that preheating after inflation may affect the amplitude of curvature perturbations on large scales, undermining the usual inflationar…
Inflation and flat directions in modular invariant superstring effective theories
Mary K. Gaillard, David H. Lyth, Hitoshi Murayama
The potential during inflation must be very flat in, at least, the direction of the inflaton. In renormalizable global supersymmetry, flat directions are ubiquitous, but they are n…
Some aspects of thermal inflation: the finite temperature potential and topological defects
Tiago Barreiro, E. J. Copeland, David H. Lyth +1
Currently favoured extensions of the Standard Model typically contain `flaton fields' defined as fields with large vacuum expectation values (vevs) and almost flat potentials. If a…
The Open Universe Grishchuk-Zel'dovich Effect
Juan Garcia-Bellido, Andrew R Liddle, David H Lyth +1
The Grishchuk--Zel'dovich effect is the contribution to the microwave background anisotropy from an extremely large scale adiabatic density perturbation, on the standard hypothesis…
False Vacuum Inflation with a Quartic Potential
David Roberts, Andrew R Liddle, David H Lyth
We consider a variant of Hybrid Inflation, where inflation is driven by two interacting scalar fields, one of which has a `Mexican hat' potential and the other a quartic potential.…