Off-Shell Noether Currents and Potentials for First-Order General Relativity. Symmetry 2021, 13, 348

Data di pubblicazione: 1 Gen 2021

Fonte dati: ARCHIVIO

We report off-shell Noether currents obtained from off-shell Noether potentials for first-order general relativity described by n-dimensional Palatini and Holst Lagrangians including the cosmological constant. These off-shell currents and potentials are achieved by using the corresponding Lagrangian and the off-shell Noether identities satisfied by diffeomorphisms generated by arbitrary vector fields, localSO (n) orSO (n− 1, 1) transformations,‘improved diffeomorphisms’, and the ‘generalization of local translations’ of the orthonormal frame and the connection. A remarkable aspect of our approach is that we do not use Noether’s theorem in its direct form. By construction, the currents are off-shell conserved and lead naturally to the definition of off-shell Noether charges. We also study what we call the ‘half off-shell’case for both Palatini and Holst Lagrangians. In particular, we find that the resulting diffeomorphism and …

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