383 citations · 1k across the 15 of their papers we have counts for
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Universality of multi-field -attractors
Ana Achúcarro, Renata Kallosh, Andrei Linde +2
We study a particular version of the theory of cosmological -attractors with , in which both the dilaton (inflaton) field and the axion field are light during inflation.…
A new class of de Sitter vacua in String Theory Compactifications
Ana Achúcarro, Pablo Ortiz, Kepa Sousa
We revisit the stability of the complex structure moduli in the large volume regime of type-IIB flux compactifications. We argue that when the volume is not exponentially large, su…
Sgoldstino inflation
Ana Achúcarro, Sander Mooij, Pablo Ortiz +1
We discuss the possibility that inflation is driven by the sgoldstino, the superpartner of the goldstino. Unlike in generic supergravity scenarios, the sgoldstino decouples from al…
Decoupling limits in multi-sector supergravities
Ana Achúcarro, Sjoerd Hardeman, Johannes M. Oberreuter +2
Conventional approaches to cosmology in supergravity assume the existence of multiple sectors that only communicate gravitationally. In principle these sectors decouple in the limi…
Mass hierarchies and non-decoupling in multi-scalar field dynamics
Ana Achúcarro, Jinn-Ouk Gong, Sjoerd Hardeman +2
In this work we study the effects of field space curvature on scalar field perturbations around an arbitrary background field trajectory evolving in time. Non-trivial imprints of t…