Published on:

28 February 2024

Primary Category:

General Relativity and Quantum Cosmology

Paper Authors:

Arijit Panda,

Debashis Gangopadhyay,

Goutam Manna

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The null energy condition is violated between two satisfied regions in the first model

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This symmetric violation indicates possible bouncing events in cosmic expansion

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The second model satisfies some energy conditions but violates others

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The second model suggests an accelerating, dark energy dominated expansion

Violation of energy condition indicates bouncing events via quantum tunneling in modified gravity

This paper develops the Raychaudhuri equation in a modified gravity theory called f(R,T) gravity, set within a non-canonical K-essence theory framework. By solving this equation with two scale factors, two f(R,T) gravity models are obtained. Analysis shows that in the first model, the null energy condition is violated between two regions where it is satisfied, indicating possible bouncing events from symmetrical violation during cosmic expansion. The second model satisfies some energy conditions but violates others, suggesting an accelerating, dark energy dominated expansion.

Energy constraints on extended gravity coupling matter and geometry

Massive gravity theory explains cosmic acceleration

Demystifying the accelerating Universe: A general audience guide to f(Q,T) gravity cosmology

Starobinsky model naturally suppresses space-time torsion

Derivation of rotating black holes in extended gravity

Galaxy lensing challenges general relativity

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