Quantum Damping of Cosmological Shear: A New Prediction from Loop Quantum Cosmologies
General Relativity and Quantum Cosmology
2026-05-26 v3 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We study the dynamics of the Bianchi I universe in modified loop quantum cosmology (mLQC-I) and uncover a robust mechanism for isotropization: the shear is dynamically suppressed after the bounce and decays rapidly in the quantum post-bounce regime, independently of the equation of state of standard matter sources. This naturally drives the Universe toward a homogeneous and isotropic expanding phase without fine-tuning. Our results show that mLQC-I provides a new quantum-gravitational mechanism for suppressing anisotropies, absent in other bounce models.
Keywords
Cite
@article{arxiv.2510.14021,
title = {Quantum Damping of Cosmological Shear: A New Prediction from Loop Quantum Cosmologies},
author = {Wen-Cong Gan and Leila L. Graef and Rudnei O. Ramos and Gustavo S. Vicente and Anzhong Wang},
journal= {arXiv preprint arXiv:2510.14021},
year = {2026}
}
Comments
revtex4-2, 2 figures and no table, v2: extended clarifications added to the manuscript, v3: version to be published in PRL