CHALLENGING ΛCDM WITH SCALAR-TENSOR f(R, T) GRAVITY AND THERMODYNAMICS OF IRREVERSIBLE MATTER CREATION

被引：1

作者：

Pinto, Miguel A. S. ^{[1
,2
]}

Harko, Tiberiu ^{[3
,4
,5
]}

Lobo, Francisco S. N. ^{[1
,2
]}

机构：

[1] Univ Lisbon, Fac Ciencias, Inst Astrofis & Ciencias Espaco, Edificio C8,Campo Grande, P-1749016 Lisbon, Portugal

[2] Univ Lisbon, Fac Ciencias, Dept Fis, Edificio C8,Campo Grande, P-1749016 Lisbon, Portugal

[3] Natl Inst Phys & Nucl Engn IFIN HH, Dept Theoret Phys, Bucharest 077125, Romania

[4] Babes Bolyai Univ, Dept Phys, Kogalniceanu St, Cluj Napoca 400084, Romania

[5] Astron Observ, 19 Ciresilor St, Cluj Napoca 400487, Romania

来源：

ACTA PHYSICA POLONICA B PROCEEDINGS SUPPLEMENT | 2023年 / 16卷 / 06期

关键词：

D O I：

10.5506/APhysPolBSupp.16.6-A28

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate gravitationally-induced particle production in the equivalent scalar-tensor representation of f(R, T) gravity. In this theory, the matter energy-momentum tensor may not be conserved due to a non-minimal curvature-matter coupling. As such, we explore the consequences of such a non-conservation within the scope of particle production by using the formalism of irreversible thermodynamics of open systems. Accordingly, we obtain the expressions for the particle creation rate and for the creation pressure. Finally, we explore the de Sitter solution with a constant and non-constant matter energy density and determine the explicit expressions for the two scalar fields and both creation rate and pressure.

引用

页数：10

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