7 papers
Testing Cosmic Distance Duality Relation and Transparency with DESI DR2
Xuwei Zhang, Xiaofeng Yang, Yunliang Ren +5
The Cosmic Distance Duality Relation (CDDR) is a fundamental principle of standard cosmology, linking luminosity (LD) and angular diameter distances (ADD). This work investigates t…
Testing the cosmological principle with quasars
Shuangnan Chen, Xiaofeng Yang, Yunliang Ren +5
The inferred velocity is consistent at the 1.56 Ï level with the value of 370 km/s from a purely kinematic interpretation of the CMB dipole. Based on the motion direction componen…
Holographic dark energy in a coasting cosmology
Yunliang Ren, Xiaofeng Yang, Xuwei Zhang +5
Coasting cosmology offers an intriguing and straightforward framework for understanding the universe. In this work, we employ the Trans-Planckian Censorship Criterion (TCC) conject…
Reconstructing Barrow Holographic Dark Energy in Gravity and Cosmic Constraint
Xuwei Zhang, Xiaofeng Yang, Yunliang Ren +4
In this work, we reconstruct the cosmological evolution of Barrow Holographic Dark Energy (BHDE) within the framework of modified gravity . Working in the coincident gauge,…
Hyperbolicity analysis of the linearised 3+1 formulation in the Teleparallel Equivalent of General Relativity
Cheng Cheng, Maria Jose Guzman
We study the properties of the principal symbol of the 3+1 equations of motion in Teleparallel Equivalent of General Relativity (TEGR) and assess the conditions for hyperbolicity.…
Non-linear Dynamics and Primordial Black Hole Formation During Kination
Cheng Cheng, Panagiotis Giannadakis, Lucien Heurtier +1
We investigate the effects of large scalar inhomogeneities during the kination epoch, a period in which the universe's dynamics are dominated by the kinetic energy of a scalar fiel…