BRST Quantization of Unimodular Gravity

Autor(es)

Upadhyay, Sudhaker ; Oksanen, Markku ; Bufalo, Rodrigo

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Journal of Physics; v. 47, n. 3, p. 350-365, JUN 2017.
• Citações Web of Science: 3

Resumo

We study the quantization of two versions of unimodular gravity, namely fully diffeomorphism-invariant unimodular gravity and unimodular gravity with fixed metric determinant, utilizing standard path integral approach. We derive the BRST symmetry of effective actions corresponding to several relevant gauge conditions. We observe that for some gauge conditions, the restricted gauge structure may complicate the formulation and effective actions, in particular, if the chosen gauge conditions involve the canonical momentum conjugate to the induced metric on the spatial hypersurface. The BRST symmetry is extended further to the finite field-dependent BRST transformation, in order to establish the mapping between different gauge conditions in each of the two versions of unimodular gravity. (AU)

• Processo FAPESP: 11/20653-3 - Teoria de campos de ordem-superior: um estudo da eletrodinâmica escalar generalizada
• Beneficiário: Rodrigo Santos Bufalo
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado