2024/12/01 by Debadri Bhattacharjee, Bhattacharjee, Debadri, K. B. Goswami +3
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Geophysics and Gravity Measurements #Nuclear Theory (nucl-th) #Relativity and Gravitational Theory
paper · pdf · doi:10.48550/arxiv.2412.00693
openalex publication_date 2024/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Perturbative Quantum Chromodynamics corrections and the colour superconductivity indicate that strongly interacting matter can manifest unique physical behaviours under extreme conditions. Motivated by this notion, we investigate the interior structure and properties of quark stars composed of interacting quark matter, which provides a comprehensive avenue to explore the strong interaction effects, within the framework of f(Q) gravity. A unified equation of state is formulated to describe various phases of quark matter, including up-down quark matter (2SC), strange quark matter (2SC+s), and the Colour-Flavor Locked (CFL) phase. By employing a systematic reparametrisation and rescaling, the number of degrees of freedom in the equation of state is significantly reduced. Utilising the Buchdahl-I metric ansatz and a linear f(Q) functional form, f(Q)=α0+α1Q, we derive the exact solutions of the Einstein field equations in presence of the unified interacting quark matter equation of state. For the 2SC phase, we examine the properties of quark stars composed of up-down quark matter. For the (2SC+s)and CFL phases, we incorporate the effects of a finite strange quark mass (ms≠0). The Tolman-Oppenheimer-Volkoff equations are numerically solved to determine the maximum mass-radius relations for each phase. Our results indicate that the model satisfies key physical criteria, including causality, energy conditions, and stability requirements, ensuring the viability of the configurations. Furthermore, the predicted radii for certain compact star candidates align well with observational data. The study highlights that quark stars composed of interacting quark matter within the f(Q) gravity framework provide a robust and physically consistent stellar model across all considered phases.