Examines topological inflation in V5, revealing falsification of the scenario against established cosmological constraints.
TQNT-V5.13 examines a minimal topological-inflation scenario built from the V5 χ-field. The scenario is found to be in tension with Planck 2018 and BICEP/Keck constraints on the scalar spectral index n_s and the tensor-to-scalar ratio r, and is therefore reported as FALSIFIED. This paper is published as part of the V5 series in the spirit of full disclosure of failed predictions: it documents what does NOT work and frames the constraints that any future V5 inflation candidate must satisfy. Complements the V5 monograph (10.5281/zenodo.19131538).
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Lilian Cariou (2026) studied this question.
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