Work

Quantum geometric formulation of Brans-Dicke theory for Bianchi I spacetime

Year: 2025

Type: article

Abstract: This paper investigates Bianchi I spacetimes within the Jordan frame of Brans-Dicke theory, incorporating the framework of effective loop quantum gravity. After developing general formulas, we analyze the robustness of classical singularity resolution due to quantum geometric effects using two common quantization schemes. We then compare the resulting physical properties. We find that both schemes replace classical singularities with regular quantum bounces. Notably, in contrast to similar studies based on general relativity, we find that all three directional scale factors of the Bianchi I spacetimes increase and after the quantum bounce they reach values similar to their initial values, leading to a merging with classical spacetimes in both schemes.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.111.043501

Authors: Manabendra Sharma, Gustavo S. Vicente, Leila L. Graef, Rudnei O. Ramos, Anzhong Wang

Institutions: Mahidol University, Inter-University Centre for Astronomy and Astrophysics, Universidade do Estado do Rio de Janeiro, Universidade Federal Fluminense, Baylor University

Language: English

Topic: Noncommutative and Quantum Gravity Theories

Subfield: Statistical and Nonlinear Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro