243 citations · 589 across the 7 of their papers we have counts for
5 papers · 2 filters
Dirac Born Infeld (DBI) Cosmic Strings
Eugeny Babichev, Philippe Brax, Chiara Caprini +2
Motivated by brane physics, we consider the non-linear Dirac-Born-Infeld (DBI) extension of the Abelian-Higgs model and study the corresponding cosmic string configurations. The mo…
Primordial perturbations and non-Gaussianities in DBI and general multi-field inflation
David Langlois, Sebastien Renaux-Petel, Daniele A. Steer +1
We study cosmological perturbations in general inflation models with multiple scalar fields and arbitrary kinetic terms, with special emphasis on the multi-field extension of Dirac…
Primordial fluctuations and non-Gaussianities in multi-field DBI inflation
David Langlois, Sebastien Renaux-Petel, Daniele A. Steer +1
We study Dirac-Born-Infeld (DBI) inflation models with multiple scalar fields. We show that the adiabatic and entropy modes propagate with a common effective sound speed and are th…
Statistical mechanics of strings with Y-junctions
R. J. Rivers, D. A. Steer
We investigate the Hagedorn transitions of string networks with Y-junctions as may occur, for example, with (p,q) cosmic superstrings. In a simplified model with three different ty…
Creating kinks from particles
Sourish Dutta, D. A. Steer, Tanmay Vachaspati
We study the creation of solitons from particles, using the model as a prototype. We consider the scattering of small, identical, wave pulses, that are equivalent to a seque…