145 citations · 153 across the 5 of their papers we have counts for
4 papers · 1 filter
The bound on the primordial tensor perturbation
David H. Lyth
I recall the well-known sufficient conditions for the bound on the spectrum of the primordial tensor perturbation. Two recent papers claim a violation of this bound, withou…
Non-gaussianity from the second-order cosmological perturbation
David H. Lyth, Yeinzon Rodriguez
Several conserved and/or gauge invariant quantities described as the second-order curvature perturbation have been given in the literature. We revisit various scenarios for the gen…
Interpreting Large Scale Structure Observations
David H Lyth, Andrew R Liddle
The standard model of large scale structure is considered, in which the structure originates as a Gaussian adiabatic density perturbation with a nearly scale invariant spectrum. Th…
The Spectral Index in the CDM Cosmogony
David H Lyth, Andrew A Liddle
In a recent paper, we suggested that the density fluctuation spectra arising from power-law (or extended) inflation, which are tilted with respect to the Harrison--Zel'dovich spect…