225 citations · 1k across the 39 of their papers we have counts for
4 papers · 1 filter
Tunneling in a Cosmological Model with Violation of Strong Energy Condition
M. A. Jafarizadeh, F. Darabi, A. Rezaei-Aghdam +1
The tunneling rate, with exact prefactor, is calculated to first order in \hbar for a closed FRW universe filled with perfect fluid violating the strong energy condition. The calcu…
On Duru-Kleinert Path Integral In Quantum Cosmology
M. A. Jafarizadeh, F. Darabi, A. R. Rastegar
We show that the Duru-Kleinert fixed energy amplitude leads to the path integral for the propagation amplitude in the closed FRW quantum cosmology with scale factor as one degree o…
Tunneling in Decaying Cosmologies and the Cosmological Constant Problem
M. A. Jafarizadeh, F. Darabi, A. Rezaei-Aghdam +1
The tunneling rate, with exact prefactor, is calculated to first order in for an empty closed Friedmann-Robertson-Walker (FRW) universe with decaying cosmological term $Λ\s…
Diffeomorphism algebra of two dimensional free massless scalar field with signature change
F. Darabi, M. A. Jafarizadeh, A. Rezaei-Aghdam
We study a model of free massless scalar fields on a two dimensional cylinder with metric that admits a change of signature between Lorentzian and Euclidean type (ET), across the t…