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Emergent Gravity from a Mass Deformation in Warped Spacetime
Tony Gherghetta, Marco Peloso, Erich Poppitz
We consider a deformation of five-dimensional warped gravity with bulk and boundary mass terms to quadratic order in the action. We show that massless zero modes occur for special…
Equation of state and Beginning of Thermalization After Preheating
Dmitry I. Podolsky, Gary N. Felder, Lev Kofman +1
We study the out-of-equilibrium nonlinear dynamics of fields after post-inflationary preheating. During preheating, the energy in the homogeneous inflaton is exponentially rapidly…
On the stability of field-theoretical regularizations of negative tension branes
N. J. Nunes, Marco Peloso
Any attempt to regularize a negative tension brane through a bulk scalar requires that this field is a ghost. One can try to improve in this aspect in a number of ways. For instanc…