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arXiv · 2605.04415

New Exponential and Polynomial $\xi$-attractors

Renata Kallosh·Andrei Linde
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Abstract

We introduce a new family of cosmological attractors with non-minimal coupling of gravity and non-canonical kinetic terms. In the Einstein frame, these models transform into a class of exponential and polynomial attractors with the spectral index $n_{s}$ spanning a broad range $1-2/N \leq n_{s} < 1-1/N$, and $r$ can decrease to zero in the limit $\xi \to \infty$. This is sufficient to match any combination of Planck, BICEP/Keck, ACT, SPT, and DESI data. We present a supergravity implementation of these models.

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Renata Kallosh, Andrei Linde. 2026-05-06. New Exponential and Polynomial $\xi$-attractors. https://arxiv.org/abs/2605.04415

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