Spectral Geometry and the One-Loop QED $β$-Function on $S^3 \times S^1$
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| Format: | Preprint |
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2026
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| _version_ | 1866918388206403584 |
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| author | Antonov, Lyudmil |
| author_facet | Antonov, Lyudmil |
| contents | We compute the one-loop QED $β$-function coefficient directly from heat kernel data of the twisted Spin$^c$ Dirac operator on $S^3 \times S^1$. Using $ζ$-function regularization, the logarithmic scale dependence is encoded in the $a_4$ coefficient of the spectral expansion. The $F_{μν} F^{μν}$ term in $a_4$ yields exactly $β(e) = e^3/(12π^2)$, independent of $r$, $L$, or background, verifying spectral RG flow without flat-space propagators. The result is independent of the radii of $S^3$ and $S^1$ and of the choice of gauge background, providing a parameter-free consistency check that spectral data on compact manifolds encode renormalization group information. Beyond a mere verification of the coupling flow, this result serves as a non-trivial consistency check of the Spectral Action Principle in a curved background. It demonstrates that universal quantum corrections can be extracted purely from geometric spectral invariants, distinguishing this geometric spectral derivation from momentum-space propagator methods. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_14081 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Spectral Geometry and the One-Loop QED $β$-Function on $S^3 \times S^1$ Antonov, Lyudmil High Energy Physics - Theory General Relativity and Quantum Cosmology Mathematical Physics 81T15, 58J50, 81T20, 35P05 We compute the one-loop QED $β$-function coefficient directly from heat kernel data of the twisted Spin$^c$ Dirac operator on $S^3 \times S^1$. Using $ζ$-function regularization, the logarithmic scale dependence is encoded in the $a_4$ coefficient of the spectral expansion. The $F_{μν} F^{μν}$ term in $a_4$ yields exactly $β(e) = e^3/(12π^2)$, independent of $r$, $L$, or background, verifying spectral RG flow without flat-space propagators. The result is independent of the radii of $S^3$ and $S^1$ and of the choice of gauge background, providing a parameter-free consistency check that spectral data on compact manifolds encode renormalization group information. Beyond a mere verification of the coupling flow, this result serves as a non-trivial consistency check of the Spectral Action Principle in a curved background. It demonstrates that universal quantum corrections can be extracted purely from geometric spectral invariants, distinguishing this geometric spectral derivation from momentum-space propagator methods. |
| title | Spectral Geometry and the One-Loop QED $β$-Function on $S^3 \times S^1$ |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology Mathematical Physics 81T15, 58J50, 81T20, 35P05 |
| url | https://arxiv.org/abs/2603.14081 |