Gravitational slip parameter and gravitational waves in Einstein-Cartan theory

被引：4

作者：

Ranjbar, Maryam ^{[1
]}

Akhshabi, Siamak ^{[1
]}

Shadmehri, Mohsen ^{[1
]}

机构：

[1] Golestan Univ, Dept Phys, Fac Sci, Gorgan, Iran

来源：

EUROPEAN PHYSICAL JOURNAL C | 2024年 / 84卷 / 03期

关键词：

MODIFIED GRAVITY; ACCELERATING UNIVERSE; COSMOLOGICAL CONSTANT; GENERAL-RELATIVITY; TORSION; SPIN; INFLATION; PERTURBATIONS; BOUNCE;

D O I：

10.1140/epjc/s10052-024-12670-4

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We study the evolution of scalar and tensor cosmological perturbations in the framework of the Einstein-Cartan theory of gravity. The value of the gravitational slip parameter which is defined as the ratio of the two scalar potentials in the Newtonian gauge, can be used to determine whether or not the gravity is modified. We calculate the value of slip parameter in the Einstein-Cartan cosmology and show that it falls within the observed range. We also discuss the evolution of the cosmic gravitational waves as another measure of the modification of gravity.

引用

页数：12

共 94 条

[1]

Abbott B. P., 2016, PHYSICAL REVIEW LETTERS, V116, P61102, DOI [10.1103/ PhysRevLett.116.061102, DOI 10.1103/PHYSREVLETT.116.061102, 10.1103/PhysRevLett.116.061102]

[2]

Abramowitz I. A. S. Milton, 1972, Handbook of Mathematical Functions with Formu-las, Graphs, and Mathematical Tables

[3]

AdlerRonald M.B., 1975, Introduction to General Relativity, V220

[4] Cosmological distances and hubble tension in Einstein-Cartan theory [J].