145 citations · 153 across the 5 of their papers we have counts for
12 papers
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…
Note about leptogenesis from gravity waves in models of inflation
David H. Lyth, Yeinzon Rodriguez, Carlos Quimbay
We show how the mechanism recently proposed by Alexander, Peskin, and Sheikh-Jabbari, in which the observed cosmic matter-antimatter asymmetry comes from the contribution of the co…
Which is the best inflation model?
David H. Lyth
Reasonable-looking models of inflation are compared, taking into account the possibility that the curvature perturbation might originate from some "curvaton" field different from t…
Generating the primordial curvature perturbation from inflation
David H. Lyth
The scale--independence of the primordial curvature perturbation suggests that it comes from the vacuum fluctuation during inflation of a light scalar field. This field may be the…
Observational constraints on models of inflation from the density perturbation and gravitino production
David H. Lyth
Present data require a spectral index $n\gsim 0.95$ at something like 1- level. If this lower bound survives it will constrain `new' and `modular' inflation models, while raisin…