PIRSA:14050061

On the role of the extra kinetic term coupling ƛ in classical Hořava-Lifshitz gravity

Pires, L. (2014). On the role of the extra kinetic term coupling ƛ in classical Hořava-Lifshitz gravity. Perimeter Institute. https://pirsa.org/14050061

Pires, Luis. On the role of the extra kinetic term coupling ƛ in classical Hořava-Lifshitz gravity. Perimeter Institute, May. 08, 2014, https://pirsa.org/14050061 

          @misc{ pirsa_PIRSA:14050061,
            doi = {10.48660/14050061},
            url = {https://pirsa.org/14050061},
            author = {Pires, Luis},
            keywords = {Quantum Gravity},
            language = {en},
            title = {On the role of the extra kinetic term coupling ƛ in classical Ho{\v{r}}ava-Lifshitz gravity},
            publisher = {Perimeter Institute},
            year = {2014},
            month = {may},
            note = {PIRSA:14050061 see, \url{https://pirsa.org}}
          }

Luis Pires Radboud Universiteit Nijmegen

DOI 10.48660/14050061
Collection
Talk Type Scientific Series
Subject

Abstract

We study the classical constraint algebra of Hořava-Lifshitz gravity, where due to the breaking of 4d diffeomorphism symmetry, there is a new dimensionless coupling absent in GR and whose role is not yet clear. Starting from two apparently contradictory results, we show how the role of the extra coupling differs between the projectable and non-projectable versions of the theory. In particular, we see how in the latter, it gives rise to a non-trivial constraint algebra, akin to the conditions seen in the CMC gauge of GR.