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Status: Unchecked ×Keyword: modified gravity cosmology ×Clear all

2 claims from 1 paper

1. Physics and Astronomy › Cosmology and Gravitation Theories

   Dark energy in non-linear f(Q,Lm) gravity with exponential parametrization of Hubble parameter

   Bayaskara, Vishwakarma, Qadeer, Praveen and Darunde · Physics Letters B · 2026

   The authors test whether a nonlinear f(Q,Lm) gravity model can explain late-time cosmic acceleration, using a fitted Hubble parametrisation constrained by Cosmic Chronometer and DESI BAO data.

   Unchecked2 claims
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   1. UncheckedIn this modified-gravity model, the reconstructed expansion history fits observations and shifts smoothly from past deceleration to present acceleration.“The reconstructed evolution is consistent with the observational measurements and describes a smooth transition from past deceleration to the present accelerated phase.”
   2. UncheckedIn this f(Q,Lm) gravity model, late-time energy density is positive and pressure negative, giving quintessence-like expansion that never becomes phantom.“The model produces positive energy density and negative pressure at late times, leading to a quintessence-like cosmic evolution without entering the phantom regime.”