70 citations · 355 across the 8 of their papers we have counts for
9 papers · 1 filter
Gravitational Wave Constraints on Multi-Brane Inflation
Ian Huston, James E. Lidsey, Steven Thomas +1
A class of non-canonical inflationary models is identified, where the leading-order contribution to the non-Gaussianity of the curvature perturbation is determined by the sound spe…
Scaling Cosmologies from Duality Twisted Compactifications
James E. Lidsey, Karim A. Malik
Oscillating moduli fields can support a cosmological scaling solution in the presence of a perfect fluid when the scalar field potential satisfies appropriate conditions. We examin…
Gravitational Wave Constraints on DBI Inflation
James E. Lidsey, Ian Huston
An upper bound on the amplitude of the primordial gravitational wave spectrum generated during ultra-violet DBI inflation is derived. The bound is insensitive to the form of the in…
Stretching the Inflaton Potential with Kinetic Energy
James E. Lidsey
Inflation near a maximum of the potential is studied when non-local derivative operators are included in the inflaton Lagrangian. Such terms can impose additional sources of fricti…
A graceful entrance to braneworld inflation
James E. Lidsey, David J. Mulryne
Positively-curved, oscillatory universes have recently been shown to have important consequences for the pre-inflationary dynamics of the early universe. In particular, they may al…
Cosmic No Hair for Collapsing Universes
James E. Lidsey
It is shown that all contracting, spatially homogeneous, orthogonal Bianchi cosmologies that are sourced by an ultra-stiff fluid with an arbitrary and, in general, varying equation…