165 citations · 321 across the 5 of their papers we have counts for
6 papers
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…
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…
On the Collision of Cosmic Superstrings
E. J. Copeland, H. Firouzjahi, T. W. B. Kibble +1
We study the formation of three-string junctions between (p,q)-cosmic superstrings, and collisions between such strings and show that kinematic constraints analogous to those found…
Kinematic Constraints on Formation of Bound States of Cosmic Strings - Field Theoretical Approach
P. Salmi, A. Achucarro, E. J. Copeland +3
Superstring theory predicts the potential formation of string networks with bound states ending in junctions. Kinematic constraints for junction formation have been derived within…
Gauge invariant cosmological perturbation theory for braneworlds
Alain Riazuelo, Filippo Vernizzi, Danièle Steer +1
We derive the gauge invariant perturbation equations for a 5-dimensional bulk spacetime in the presence of a brane. The equations are derived in full generality, without specifying…
Exploiting duality in a toy model of QCD at non-zero temperature and chemical potential: the massive Thirring model, sine-Gordon model and Coulomb gases
D. A. Steer, A. Gomez Nicola, R. J. Rivers +1
We focus on the massive Thirring model in 1+1 dimensions at finite temperature and non-zero chemical potential, and comment on some parallels between this model and QCD. In QCD, ca…