English

Chaplygin and Polytropic gases Teleparallel Robertson-Walker $F(T)$ gravity solutions

General Relativity and Quantum Cosmology 2025-10-03 v2 High Energy Physics - Theory Mathematical Physics math.MP

Abstract

This paper investigates the Teleparallel Robertson-Walker (TRW) F(T)F(T) gravity solutions for a Chaplygin gas, and then for any polytropic gas cosmological source. We use the TRW F(T)F(T) gravity field equations (FEs) for each kk-parameter value case and the relevant gas equation of state (EoS) to find the new teleparallel F(T)F(T) solutions. For flat k=0k=0 cosmological case, we find analytical solutions valid for any cosmological scale factor. For curved k=±1k=\pm 1 cosmological cases, we find new approximated teleparallel F(T)F(T) solutions for slow, linear, fast and very fast universe expansion cases summarizing by a double power-law function. All the new solutions will be relevant for future cosmological applications on dark matter, dark energy (DE) quintessence, phantom energy, Anti-deSitter (AdS) spacetimes and several other cosmological processes.

Keywords

Cite

@article{arxiv.2508.19912,
  title  = {Chaplygin and Polytropic gases Teleparallel Robertson-Walker $F(T)$ gravity solutions},
  author = {Alexandre Landry},
  journal= {arXiv preprint arXiv:2508.19912},
  year   = {2025}
}

Comments

19 pages, 1 figure and 1 table. Published in Mathematics journal