Project description
Research could shed more light on how gravity works on large cosmological scales
Launched in July 2023, the Euclid mission will soon provide us with the most extensive and precise map of galaxies positions and shapes. This marks a transformational moment for testing gravity on cosmological scales, allowing a detailed comparison of the action of gravity on light and matter in regimes vastly different from where general relativity has been confirmed. A robust theoretical framework is needed to translate this data into concepts. Funded by the European Research Council, the GraviPULSE project aims to construct such a framework, developing accurate predictions of large-scale phenomenology that extend into the non-linear regime. These will be built following strict criteria provided by fundamental physics, eventually allowing GraviPULSE to offer new understanding of gravity on cosmological scales.
Objective
How does gravity work on cosmological scales? Starting from July 2023, for the very first time in the history of space science, the geometry of the Universe Large Scales will be mapped by the Euclid mission, providing the scientific community with a wealth of cosmological data of unprecedented quantity and quality. It will be a transformational moment that will open a new ground for testing gravity; yet, unless combined with a theoretical framework able to translate wonderful numbers into concepts, this is bounded to be a missed opportunity. This research program - whose proponent is currently serving in the role of co-Lead of Euclid Theory Working Group - aims at constructing such a framework.
Euclid will compare the action of gravity on light with that on non-relativistic particles, in a regime vastly different from where General Relativity has been confirmed. Any significant detection of a deviation, will have profound consequences. But how to confidently dissect and decipher these potential signals? In the past years I have laid the ground work for cosmological tests of gravity, culminating recently in a first reconstruction of gravity from available data. These results are at their infancy and a leap beyond the current state of the art is urgently required to breach into the smaller, nonlinear scales where statistical errors will be at their lowest. The timing could not be better, with data releases of Euclid expected during the tenure of this proposal.
From an exhaustive exploration of the gravitational landscape under criteria of theoretical viability, we will create predictions of the Large Scales phenomenology by broad classes of theories, with an accuracy that meets Euclid requirements. These will be used to construct a comprehensive phenomenological framework extending into the nonlinear regime and inform bayesian non-parametric reconstructions of gravity from the latest data. As a result, we will provide a completely new view into gravity on Large Scales
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques.
- natural sciencesphysical sciencesrelativistic mechanics
- humanitieshistory and archaeologyhistory
- natural sciencesmathematicspure mathematicsgeometry
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Keywords
Programme(s)
- HORIZON.1.1 - European Research Council (ERC) Main Programme
Funding Scheme
HORIZON-ERC - HORIZON ERC GrantsHost institution
2311 EZ Leiden
Netherlands