298 citations · 987 across the 12 of their papers we have counts for
12 papers
Slow-Roll Inflation in the Presence of a Dark Energy Coupling
Philippe Brax, Carsten van de Bruck, Lisa M. H. Hall +1
In models of coupled dark energy, in which a dark energy scalar field couples to other matter components, it is natural to expect a coupling to the inflaton as well. We explore the…
Large non-Gaussianity from two-component hybrid inflation
Christian T. Byrnes, Ki-Young Choi, Lisa M. H. Hall
We study the generation of non-Gaussianity in models of hybrid inflation with two inflaton fields, (2-brid inflation). We analyse the region in the parameter and the initial condit…
Conditions for large non-Gaussianity in two-field slow-roll inflation
Christian T. Byrnes, Ki-Young Choi, Lisa M. H. Hall
We study the level of primordial non-Gaussianity in slow-roll two-field inflation. Using an analytic formula for the nonlinear parameter f_nl in the case of a sum or product separa…
Lack of initial conditions dependence of fluctuations in warm inflation
Arjun Berera, Lisa M. H. Hall, Ian G. Moss +1
Warm inflation dynamics is fundamentally based on a system-reservoir configuration in which the dynamics is dictated by a fluctuation-dissipation relation. Recent work by Cerioni e…
Standard Cosmological Evolution in a Wide Range of f(R) Models
Jonathan D. Evans, Lisa M. H. Hall, Philippe Caillol
Using techniques from singular perturbation theory, we explicitly calculate the cosmological evolution in a class of modified gravity models. By considering the (m)CDTT model, whic…
Cosmological Constraints on Dissipative Models of Inflation
Lisa M. H. Hall, Hiranya V. Peiris
(Abridged) We study dissipative inflation in the regime where the dissipative term takes a specific form, Γ=Γ(ϕ), analyzing two models in the weak and strong dissipative regimes wi…