Objective The theory of cosmic inflation is the current paradigm for early universe cosmology. I propose a research and training programme centered around two themes in inflationary cosmology. First, I will determine new signatures of high-energy physics in inflation i) by finding new shapes of non-Gaussianity, in particular signatures from the tower of higher-spin states predicted in high-energy completions of gravity such as string theory, and also ii) by studying natural extensions of the tensor sector, in particular higher spin fields with partial gauge symmetries, and the imprints left by these fields in tensor non-Gaussianity and in the cosmic microwave background (CMB) radiation. To achieve i) and ii), I will use methods of field theory in curved backgrounds, as well as general symmetry properties of cosmological correlation functions. Second, I will study quantum instabilities in de Sitter space, as well as an analogue in flat space, a constant background electric field. The instabilities will be determined by studying response functions and vacuum polarization in strong fields. The signatures proposed in the first theme will provide tools to perform particle spectroscopy and determine the field content of inflation. The effects proposed in the second theme are a potential microscopic mechanism for the dynamics of inflation. This programme will be conducted at the University of Amsterdam, giving me access to a wide network of collaborators in the fields of high-energy physics and cosmology, and provide me extensive training in various aspects of inflationary cosmology, CMB physics, string theory and the dynamics of systems out of equilibrium. The skills acquired in this proposal will tie excellently with my previous formation in cosmological perturbation theory, single-field inflation, and the dS/CFT correspondence. Fields of science natural sciencesphysical sciencestheoretical physicsparticle physicsnatural sciencesphysical sciencestheoretical physicsstring theorynatural sciencesphysical sciencesastronomyphysical cosmologynatural sciencesphysical sciencesopticsspectroscopy Programme(s) H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions Main Programme H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility Topic(s) MSCA-IF-2016 - Individual Fellowships Call for proposal H2020-MSCA-IF-2016 See other projects for this call Funding Scheme MSCA-IF-EF-ST - Standard EF Coordinator UNIVERSITEIT VAN AMSTERDAM Net EU contribution € 177 598,80 Address Spui 21 1012WX Amsterdam Netherlands See on map Region West-Nederland Noord-Holland Groot-Amsterdam Activity type Higher or Secondary Education Establishments Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Other funding € 0,00
