NLQG
Financiado
Understanding NonLocality in Quantum Gravity
The formulation of a consistent theory of quantum gravity is one of the most outstanding unsolved problems in Theoretical Physics, which has attracted interest since the middle of the last century. In the past decades several prom...
The formulation of a consistent theory of quantum gravity is one of the most outstanding unsolved problems in Theoretical Physics, which has attracted interest since the middle of the last century. In the past decades several promising approaches to quantum gravity have been proposed. Despite their intrinsic differences, many of them seem to predict the emergence of nonlocality at the microscopic level, i.e. at short distances and high energies, indicating that the gravitational interaction is nonlocal in nature rather than point-like. This feature could be the key to solving open issues in gravitational physics - such as classical curvature singularities and quantum divergences - as nonlocality naturally introduces a physical cut-off scale. Nonlocal physics is expected to manifest through specific non-polynomial form factors in the quantum gravitational Lagrangian whose derivation, however, is still pending in all known approaches. The aim of the proposed project is to derive and use fundamental consistency requirements of causality, stability, unitarity, and healthy high-energy behaviour to constrain the viable form factors, and thus the space of allowed quantum field theories of gravity. The study will be model-independent but its implications can severely limit the feasibility of various quantum gravity programs. This project will take the field of nonlocal gravity beyond its current state-of-the-art by deriving novel causality constraints, constructing for the first time the Hamiltonian for infinite derivative Lagrangians, and pioneering a complete one-loop computation of the quantum effective action. The unique scenario to test new physics beyond general relativity provided by the new era of precision cosmology and gravitational-wave astronomy makes this project highly timely. Achieving the proposed goals can place nonlocal theories of gravity on firmer ground and lay the foundation for future phenomenological applications in cosmology and astrophysics.
ver más
Duración del proyecto: 30 meses
Fecha Inicio: 2023-05-09
Fecha Fin: 2025-11-30
Fecha Fin: 2025-11-30
Línea de financiación: concedida
El organismo HORIZON EUROPE notifico la concesión del proyecto el día 2023-05-09
Línea de financiación objetivo
El proyecto se financió a través de la siguiente ayuda:
HORIZON-MSCA-2022-PF-01-01:
MSCA Postdoctoral Fellowships 2022
Cerrada
hace 2 años
Presupuesto
El presupuesto total del proyecto asciende a
203K€
Líder del proyecto
STICHTING RADBOUD UNIVERSITEIT
No se ha especificado una descripción o un objeto social para esta compañía.
Perfil tecnológico
TRL
4-5
Perfil tecnológico
TRL
4-5