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arXiv · 2507.02738

Cosmological constraints from UV/IR mixing

Niccolò Cribiori·Flavio Tonioni
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Abstract

Holography and entropy bounds suggest that the ultraviolet (UV) and infrared (IR) cutoffs of gravitational effective theories are related to one another as a form of UV/IR mixing. Motivated by this, we derive a bound on the allowed scalar field range in theories with cosmic horizons. We show how this bound challenges several inflationary scenarios, such as $\alpha$-attractors and modular-invariant inflation. Besides, we find a relation between the number of extra spatial dimensions and the tensor-to-scalar ratio.

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Niccolò Cribiori, Flavio Tonioni. 2025-07-03. Cosmological constraints from UV/IR mixing. https://arxiv.org/abs/2507.02738

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