Mahdiyar Noorbala

activity

20152020

collaborators

6 papers

hep-th2020

Stochastic non-attractor inflation

Hassan Firouzjahi, Amin Nassiri-Rad, Mahdiyar Noorbala

We extend the formalism of stochastic inflation to the setup of non-attractor inflation with a sound speed $c_{s}$ . We obtain the Langevin equations for the superhorizon perturbation…

hep-th2019

Boundary Crossing in Stochastic Inflation with Critical Number of Fields

Mahdiyar Noorbala, Hassan Firouzjahi

We study boundary crossing probability in the context of stochastic inflation. We prove that for a generic multi-field inflationary potential, the probability that the inflaton rea…

hep-th2018

Stochastic Ultra Slow Roll Inflation

Hassan Firouzjahi, Amin Nassiri-Rad, Mahdiyar Noorbala

We study the ultra slow roll model in the context of stochastic inflation. Using stochastic $δ N$ formalism, we calculate the mean number of $e$ -folds, the power spectrum, the bispe…

hep-th2018

Tunneling in Stochastic Inflation

Mahdiyar Noorbala, Vincent Vennin, Hooshyar Assadullahi +2

The relative probability to decay towards different vacua during inflation is studied. The calculation is performed in single-field slow-roll potentials using the stochastic inflat…

physics.optics2016

Is $n sin θ$ conserved along light path?

Mahdiyar Noorbala, Reza Sepehrinia

Snell's law states that the quantity $n sin θ$ is unchanged in refraction of light passing from one medium to another. We inquire whether this is true in the general case where the…

hep-th2015

QED without Gauge Fields