Quantum Damping of Cosmological Shear: A New Prediction from Loop Quantum Cosmologies
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866918518949150720 |
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| author | Gan, Wen-Cong Graef, Leila L. Ramos, Rudnei O. Vicente, Gustavo S. Wang, Anzhong |
| author_facet | Gan, Wen-Cong Graef, Leila L. Ramos, Rudnei O. Vicente, Gustavo S. Wang, Anzhong |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_14021 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum Damping of Cosmological Shear: A New Prediction from Loop Quantum Cosmologies Gan, Wen-Cong Graef, Leila L. Ramos, Rudnei O. Vicente, Gustavo S. Wang, Anzhong General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology High Energy Physics - Theory 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. |
| title | Quantum Damping of Cosmological Shear: A New Prediction from Loop Quantum Cosmologies |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2510.14021 |