Browsing by Author "30a5a0c7-cf80-4994-b4ef-d7757ec37186"

Now showing items 1-5 of 5

    • Constraints on Holographic Multifield Inflation and Models Based on the Hamilton-Jacobi Formalism 
      Achúcarro, Ana; Céspedes, Sebastián; Davis, Anne Christine; Palma, Gonzalo A. (American Physical Society, 2019)
      In holographic inflation, the 4D cosmological dynamics is postulated to be dual to the renormalization group flow of a 3D Euclidean conformal field theory with marginally relevant operators. The scalar potential of the 4D ...
    • Cumulative effects in inflation with ultra-light entropy modes 
      Achúcarro, Ana; Atal, Vicente; Germani, Cristiano; Palma Quilodrán, Gonzalo (Institute of Physics Publishing, 2017)
      In multi-field inflation one or more non-adiabatic modes may become light, potentially inducing large levels of isocurvature perturbations in the cosmic microwave background. If in addition these light modes are coupled ...
    • 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 ...
    • The string swampland constraints require multi-field inflation 
      Achúcarro, Ana; Palma, Gonzalo A. (Institute of Physics Publishing, 2019)
      An important unsolved problem that affects practically all attempts to connect string theory to cosmology and phenomenology is how to distinguish effective field theories belonging to the string landscape from those that ...