4 papers
Linear Higher-Order Maxwell-Einstein-Scalar Theories
Mohammad Ali Gorji, Shinji Mukohyama, Pavel Petrov +1
In the context of the Higher-Order Maxwell-Einstein-Scalar (HOMES) theories, which are invariant under spacetime diffeomorphisms and gauge symmetry, we study two broad subcl…
Unique gravitational wave signatures of GLPV scalar-tensor theories
Guillem Domènech, Alexander Ganz, Mohammad Ali Gorji +1
We study gravitational waves induced by scalar primordial fluctuations in Gleyzes-Langlois-Piazza-Vernizzi (GLPV), beyond Horndeski, scalar-tensor theories. We uncover, at the leve…
Peaks sphericity of non-Gaussian random fields
Cristiano Germani, Mohammad Ali Gorji, Michiru Uwabo-Niibo +1
We formulate the statistics of peaks of non-Gaussian random fields and implement it to study the sphericity of peaks. For non-Gaussianity of the local type, we present a general fo…
Small noise expansion of stochastic inflation
Diego Cruces, Cristiano Germani, Amin Nassiri-Rad +1
By introducing the small noise expansion techniques, we show that the fully nonlinear (non-Markovian) stochastic inflationary system, may be re-cast in terms of an infinite set of…