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Anisotropic cosmology in Bumblebee gravity theory

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arxiv 2407.13487 v2 pith:QYPG3X7O submitted 2024-07-18 gr-qc

Pranjal Sarmah , Umananda Dev Goswami This is my paper · ORCID
classification gr-qc
keywords bumblebeefieldanisotropyeffectcosmologystudiedanisotropiccosmic
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abstract

The Bumblebee vector model of spontaneous Lorentz symmetry breaking (LSB) in Bianchi type I (BI) Universe to observe its effect on cosmological evolution is an interesting aspect of study in anisotropic cosmology. In this study, we have considered a Bumblebee field under vacuum expectation value condition (VEV) with BI metric and studied the cosmological parameters along with observational data. Further, we have studied the effect of anisotropy and the Bumblebee field in cosmic evolution. We have also studied the effect of both anisotropy and Bumblebee field while considering the Universe as a dynamical system. We have found that there are some prominent roles of both anisotropy and the Bumblebee field in cosmic evolutions. We have also observed an elongated matter-dominated phase as compared to standard cosmology. Moreover, while studying the dynamical system analysis, we have also observed the shift of critical points from standard $\Lambda$CDM results showing the anisotropy and the Bumblebee field effect.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Primordial black hole in Lorentz-violating theories: Insights from Bumblebee gravity

    gr-qc 2026-07 conditional novelty 6.0 of 10

    Bumblebee gravity enhances primordial black hole abundance through three mechanisms, but the model harbors a ghost instability and a tachyonic instability that make it cosmologically unviable.

  2. Optical Appearance and Shadow of Kalb-Ramond Black Hole: Effects of Plasma and Accretion Models

    gr-qc 2025-06 conditional novelty 4.0 of 10

    For a static Kalb-Ramond black hole, increasing the Lorentz-breaking parameters shrinks the shadow, while plasma shrinks the shadow but brightens it, giving tentative signatures to distinguish it from Schwarzschild.

  3. Super-entropy bumblebee AdS black holes

    gr-qc 2025-01 reject novelty 4.0 of 10

    The paper claims bumblebee AdS black holes are super-entropy when l>0 and connects this to negative C_P, but the C_P analysis contains a sign error.

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