Browsing by Author "e3f235b0-7d6f-46ff-90ff-9a74f883453c"

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    • Origin of ultra-light fields during ination and their suppressed non-Gaussianity 
      Achúcarro, Ana; Palma, Gonzalo A.; Wang, Dong-Gang; Welling, Yvette (IOP Publishing, 2020)
      We study the structure of multi-field inflation models where the primordial curvature perturbation is able to vigorously interact with an ultra-light isocurvature field - a massless fluctuation orthogonal to the background ...
    • Shift-symmetric orbital inflation: Single field or multifield? 
      Achúcarro, Ana; Copeland, Edmund J.; Iarygina, Oksana; Palma Quilodrán, Gonzalo; Wang, Dong-Gang; Welling, Yvette (American Physical Society (APS), 2020)
      We present a new class of two-field inflationary attractor models, known as shift-symmetric orbital inflation, whose behavior is strongly multifield but whose predictions are remarkably close to those of single-field ...