Work

Thermodynamic of the f(Q) universe

Year: 2024

Type: article

Abstract: We investigate thermodynamics of apparent horizon in the f(Q) universe with trivial and nontrivial connections. We first explore the perspectives of the first law, generalized second law and P–V phase transition with trivial connection. We show that the lowest-order correction of entropy has the same form as that in loop quantum gravity, and the critical exponents of the phase transition caused by the lowest-order correction are consistent with those in mean field theory. We then examine the thermodynamic implication of nontrivial connections. We find that nontrivial connections in the f(Q) universe imply non-equilibrium states from the perspective of thermodynamics.

Source: The European Physical Journal C

DOI: 10.1140/epjc/s10052-024-13711-8

Authors: Haomin Rao, Chunhui Liu, Chao-Qiang Geng

Institutions: University of Chinese Academy of Sciences, Chinese Academy of Sciences, Institute of Theoretical Physics, Hunan Normal University

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China

Awards: G3185048351, G3289481219, G5847793060