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January 17, 2026Modern Physics Letters A

Generalized fractional deceleration as a tool to decode the universe’s expansion

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Authors

RMR. K. MishraPAPriya AwasthiRSRahul Sharma

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Overview

Cosmological model assesses cosmic expansion dynamics in a viscous universe, suggesting acceleration phases.

Key Points

  • The research aims to develop a cosmological model using bulk viscous fluid to understand the universe's expansion.
  • Investigated a cosmological model under modified gravity
  • Considered a bulk viscous fluid as the cosmic source
  • Derived an exact solution of field equations using a time-dependent deceleration parameter
  • Computed higher-order kinematic parameters such as jerk, snap, and lerk
  • Imposed a relation between directional scale factors to simplify anisotropic equations.
  • Found that higher-order kinematic parameters approach unity, consistent with the standard CDM model
  • Derived expressions for energy density, effective pressure, and equation of state parameter w
  • Indicated a transition from deceleration to acceleration in cosmic expansion dynamics

Cite This Study

Mishra et al. (2026) studied this question.

synapsesocial.com/papers/696b2696d2a12237a9349e5chttps://doi.org/10.1142/s0217732326500240
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