Trace of energy-momentum tensor and gravitational backreaction of Schwinger scalars in the 3D de Sitter spacetime

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Bavarsad e.; Mortezazadeh m.

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Journal: Iranian Journal of Physics Research Year:2018 | Volume:18 | Issue:1 Page(s): 0-0

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Title

Trace of energy-momentum tensor and gravitational backreaction of Schwinger scalars in the 3D de Sitter spacetime

Author(s)

Bavarsad e. | Mortezazadeh m. | Issue Writer Certificate

Keywords

de Sitter spacetimeQ1

Scalar fieldQ1

Schwinger effectQ1

trace of energy-momentum tensorQ1

Adiabatic subtraction regularizationQ1

Abstract

In this paper, we consider a massive charged Scalar field coupled to a uniform background electric field in a 3 dimensional de Sitter spacetime. We also consider the constant value of the dimensionless coupling 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, showing that by using te Adiabatic subtraction regularization method, the linear ultraviolet divergence is removed and a finite expression is obtained. We investigate the behavior of the regularized trace with different intensities of the Scalar field mass and electric fields. We show that the trace as a function of the electric field has a discontinuity where it changes the sign. In the case of a Scalar field conformally coupled to the de Sitter spacetime, we show that the trace vanishes and there is no trace anomaly. We discuss the gravitational backreaction effect of the created Schwinger pairs.

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APA: Copy

Bavarsad, e., & Mortezazadeh, m.. (2018). Trace of energy-momentum tensor and gravitational backreaction of Schwinger scalars in the 3D de Sitter spacetime. IRANIAN JOURNAL OF PHYSICS RESEARCH, 18(1 ), 0-0. SID. https://sid.ir/paper/1429/en

Vancouver: Copy

Bavarsad e., Mortezazadeh m.. Trace of energy-momentum tensor and gravitational backreaction of Schwinger scalars in the 3D de Sitter spacetime. IRANIAN JOURNAL OF PHYSICS RESEARCH[Internet]. 2018;18(1 ):0-0. Available from: https://sid.ir/paper/1429/en

IEEE: Copy

e. Bavarsad, and m. Mortezazadeh, “Trace of energy-momentum tensor and gravitational backreaction of Schwinger scalars in the 3D de Sitter spacetime,” IRANIAN JOURNAL OF PHYSICS RESEARCH, vol. 18, no. 1 , pp. 0–0, 2018, [Online]. Available: https://sid.ir/paper/1429/en

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