@ARTICLE{Bavarsad,
author = {Bavarsad, E and Mortezazadeh, M and },
title = {Trace of energy-momentum tensor and gravitational backreaction of Schwinger scalars in 3D de Sitter spacetime},
volume = {18},
number = {1},
abstract ={In this paper, we consider a massive charged scalar field coupled to a uniform electric field background in a 3 dimensional de Sitter spacetime. We consider the value of the dimensionless coupling constant of the scalar field to the scalar curvature of a 3 dimensional de Sitter spacetime equal to 1/8. We compute the expectation value of the trace of the energy-momentum tensor in the in-vacuum state and we show that using adiabatic subtraction regularization method the linear ultraviolet divergence is removed and a finite expression obtain. We investigate the behavior of the regularized trace for different intensities of the scalar field mass and the electric field. We show that the trace as a function of the electric field has a discontinuity at which it changes the sign. We show that for the case of a conformally coupled scalar field to the de Sitter spacetime the trace vanishes, and there is no trace anomaly. We discuss the gravitational backreaction effect of the created Schwinger pairs. },
URL = {http://ijpr.iut.ac.ir/article-1-2465-en.html},
eprint = {http://ijpr.iut.ac.ir/article-1-2465-en.pdf},
journal = {Iranian Journal of Physics Research},
doi = {10.29252/ijpr.18.1.91},
year = {2018}
}