Journal of Siberian Federal University. Mathematics & Physics / Existence of Bianchi type Cosmological Phantom universe with Polytropic EoS Parameter in Lyra’s Geometry

Full text (.pdf)
Issue
Journal of Siberian Federal University. Mathematics & Physics. 2025 18 (1)
Authors
Suryanarayana Kornu; Rajamahanthi Santhikumar; A. Lakshmana Rao; M. Ramanamurty; P. Sudheer Kumar; K. Seetharam; B. Divya
Contact information
Suryanarayana Kornu: Aditya Institute of Technology and Management K. Kotturo Tekkali, Srikakulam-532201, Andhra Pradesh, India; Rajamahanthi Santhikumar: Aditya Institute of Technology and Management K. Kotturo Tekkali, Srikakulam-532201, Andhra Pradesh, India; OCRID: 0000-0001-5122-3800; A. Lakshmana Rao: Aditya Institute of Technology and Management K. Kotturo Tekkali, Srikakulam-532201, Andhra Pradesh, India; M. Ramanamurty: Aditya Institute of Technology and Management K. Kotturo Tekkali, Srikakulam-532201, Andhra Pradesh, India; P. Sudheer Kumar: Aditya Institute of Technology and Management K. Kotturo Tekkali, Srikakulam-532201, Andhra Pradesh, India; K. Seetharam: Aditya Institute of Technology and Management K. Kotturo Tekkali, Srikakulam-532201, Andhra Pradesh, India; B. Divya: Aditya Institute of Technology and Management K. Kotturo Tekkali, Srikakulam-532201, Andhra Pradesh, India
Keywords
accelerated expansion; polytropic Eequation of state; perfect fluid; phantom universe; Lyra’s geometry
Abstract

This study explores the Bianchi type-V cosmological model with in the frame work of general relativity, featuring a perfect fluid governed by the polytropic equation in Lyra’s Geometry, expressed p = αρ + kρn, as proposed at [1]. We considered the case representing phantom universe for(1 + α + kρn−1) 6 0, k < 0 , where ρ increases with the radius a(t). The role of Lyra;s Geometry has been discussed/ The solution to Einsteins field equation have been derived, providing insights into the physical and cosmological attributes of this particular model

Pages
32–40
EDN
CRYONU
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/154248