The dressed-metric approach is shown to violate general covariance by demonstrating that it cannot have an off-shell completion in which the correct infinitesimal relations of space-time hypersurface deformations are realized. The main underlying reason - a separation of background degrees of freedom and modes of inhomogeneity that is incompatible with covariance - is shared with other approaches such as hybrid loop quantum cosmology.
|Original language||English (US)|
|Journal||Physical Review D|
|State||Published - Jul 15 2020|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)