74 citations · 183 across the 5 of their papers we have counts for
5 papers
The rise of the primordial tensor spectrum from an early scalar-tensor epoch
Debika Chowdhury, Gianmassimo Tasinato, Ivonne Zavala
Primordial gravitational waves (PGW) produced during inflation span a large range of frequencies, carrying information on the dynamics of the primordial universe. During an early s…
A new mechanism to enhance primordial tensor fluctuations in single field inflation
Maria Mylova, Ogan Özsoy, Susha Parameswaran +2
We discuss a new mechanism to enhance the spectrum of primordial tensor fluctuations in single field inflationary scenarios. The enhancement relies on a transitory non-attractor in…
Regular S-Brane Backgrounds
G. Tasinato, I. Zavala, C. P. Burgess +1
We construct time-dependent S-brane solutions to the supergravity field equations in various dimensions which (unlike most such geometries) do not contain curvature singularities.…
Instabilities and Particle Production in S-Brane Geometries
C. P. Burgess, P. Martineau, F. Quevedo +2
We study the classical stability of a class of S-brane geometries having cosmological horizons. By considering the perturbations of the metric in these geometries we establish that…
Branes on Charged Dilatonic Backgrounds: Self-Tuning, Lorentz Violations and Cosmology
C. Grojean, F. Quevedo, G. Tasinato +1
We construct an n+q+2 dimensional background that has dilatonic q-brane singularities and that is charged under an antisymmetric tensor field, the background spacetime being maxima…