83 citations · 248 across the 7 of their papers we have counts for
7 papers
On the Anisotropy of the Gravitational Wave Background from Massless Preheating
Laura Bethke, Daniel G. Figueroa, Arttu Rajantie
When a light scalar field is present during inflation, its value will vary on superhorizon scales, modulating the preheating process at the end of inflation. Consequently, the ampl…
Anisotropies in the Gravitational Wave Background from Preheating
Laura Bethke, Daniel G. Figueroa, Arttu Rajantie
We investigate the anisotropies in the gravitational wave (GW) background produced at preheating after inflation. Using lattice field theory simulations of a massless preheating mo…
New ground state for quantum gravity
Joao Magueijo, Laura Bethke
In this paper we conjecture the existence of a new "ground" state in quantum gravity, supplying a wave function for the inflationary Universe. We present its explicit perturbative…
Decomposition, diffusion, and growth rate anisotropies in self-limited profiles during metalorganic vapor-phase epitaxy of seeded nanostructures
E. Pelucchi, V. Dimastrodonato, A. Rudra +5
We present a model for the interplay between the fundamental phenomena responsible for the formation of nanostructures by metalorganic vapour phase epitaxy on patterned (001)/(111)…
Chirality of tensor perturbations for complex values of the Immirzi parameter
Laura Bethke, Joao Magueijo
In this paper we generalise previous work on tensor perturbations in a de Sitter background in terms of Ashtekar variables to cover all complex values of the Immirzi parameter gamm…
Inflationary tensor fluctuations, as viewed by Ashtekar variables and their imaginary friends
Laura Bethke, Joao Magueijo
We investigate tensor modes in inflationary scenarios from the point of view of Ashtekar variables and their generalizations labelled by Immirzi parameter γ, which we'll assume ima…