Hamiltonian analysis of metric-affine-R.sup.2./sup. theory

0585964 - FZÚ 2025 RIV US eng J - Journal Article
Glavan, Dražen - Zlosnik, T. - Lin, Ch.
Hamiltonian analysis of metric-affine-R² theory.
Journal of Cosmology and Astroparticle Physics. Roč. 2024, č. 4 (2024), č. článku 072. ISSN 1475-7516. E-ISSN 1475-7516
R&D Projects: GA MŠMT(CZ) EH22_010/0002906
Institutional support: RVO:68378271
Keywords : modified gravity * Hamiltonian constraint analysis * torsion * nonmetricity
OECD category: Particles and field physics
Impact factor: 6.3, year: 2022
Method of publishing: Open access

Determining the number of propagating degrees of freedom in metric-affine theories of gravity requires the use of Hamiltonian constraint analysis, except in some subclasses of theories. We develop the technicalities necessary for such analyses and apply them to the Weyl-invariant and projective-invariant case of metric-affine-R2 theory that is known to propagate just the graviton. This serves as a check of the formalism and a case study where we introduce appropriate ADM variables for the distortion 3-tensor tensor and its time derivatives, that will be useful when analyzing more general metric-affine theories where the physical spectrum is not known.

Permanent Link: https://hdl.handle.net/11104/0353595