Ward Identity Constraints on Loop Corrections in Non-Attractor Inflation
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909030336692224 |
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| author | Fang, Cheng-Jun Lyu, Zhen-Hong Chen, Chao Guo, Zong-Kuan |
| author_facet | Fang, Cheng-Jun Lyu, Zhen-Hong Chen, Chao Guo, Zong-Kuan |
| contents | The conservation of super-horizon curvature perturbations in strongly interacting inflationary models, particularly in the presence of quantum-loop corrections, remains a topic of active debate. We found that this conservation is essentially a direct consequence of the symmetry in perturbation theory. We demonstrate that the associated Ward identity imposes strict non-perturbative constraints on the infrared power spectrum. This finding provides a rigorous, symmetry-based framework for understanding nonlinear quantum fluctuations in the primordial universe. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2507_00077 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ward Identity Constraints on Loop Corrections in Non-Attractor Inflation Fang, Cheng-Jun Lyu, Zhen-Hong Chen, Chao Guo, Zong-Kuan Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Theory The conservation of super-horizon curvature perturbations in strongly interacting inflationary models, particularly in the presence of quantum-loop corrections, remains a topic of active debate. We found that this conservation is essentially a direct consequence of the symmetry in perturbation theory. We demonstrate that the associated Ward identity imposes strict non-perturbative constraints on the infrared power spectrum. This finding provides a rigorous, symmetry-based framework for understanding nonlinear quantum fluctuations in the primordial universe. |
| title | Ward Identity Constraints on Loop Corrections in Non-Attractor Inflation |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2507.00077 |