Gravitational Slip parameter and Gravitational Waves in Einstein-Cartan theory

• DOI: 10.48550/arxiv.2401.02129
• Publication Date: 2024-01-01
• Authors: Maryam Ranjbar; Siamak Akhshabi; Mohsen Shadmehri
• Keywords: Speed of gravity

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