Objective
While a full theory of quantum gravity remains yet elusive, one can still make quantum-gravitational predictions by treating gravity perturbatively around a fixed classical background. This approach is particularly important in cosmology, where tree-level predictions have been confirmed in observations, and next-generation experiments measuring the 21-cm hydrogen line are very likely sensitive enough to test loop corrections. The objective of this proposal is the study of correlation functions at fixed geodesic distance. These observables possess two desirable properties: a) they are confined to a region of finite physical size, and thus measurable, so that one can test the predictions of any theory of quantum gravity against them; and b) they are gauge-invariant, and thus can be used to separate physical effects from gauge artefacts in many gauge-fixed loop calculations that have been carried out in cosmology. The main open problem about these observables is how to renormalise them, which has not been solved even at the one-loop order in perturbation theory. To solve this problem, we apply ideas from the study of Wilson loops in non-Abelian gauge theories, the only other nonlocal observable in quantum field theory which has been investigated in detail. Since these observables are also potentially important in AdS/CFT correspondence, we study them for all maximally symmetric spaces, i.e. Minkowski, de Sitter as well as anti-de Sitter spaces.
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. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences physical sciences quantum physics quantum field theory
- natural sciences mathematics pure mathematics algebra
- natural sciences physical sciences astronomy physical cosmology
- natural sciences mathematics pure mathematics arithmetics logarithmic functions
- natural sciences physical sciences theoretical physics
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Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions
MAIN PROGRAMME
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H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility
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Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
MSCA-IF-EF-ST - Standard EF
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Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) H2020-MSCA-IF-2015
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Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.
YO10 5DD YORK NORTH YORKSHIRE
United Kingdom
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.