Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8186701 | Physics Letters B | 2018 | 4 Pages |
Abstract
Rastall gravity, originally developed in 1972, is currently undergoing a significant surge in popularity. Rastall gravity purports to be a modified theory of gravity, with a non-conserved stress-energy tensor, and an unusual non-minimal coupling between matter and geometry, the Rastall stress-energy satisfying . Unfortunately, a deeper look shows that Rastall gravity is completely equivalent to Einstein gravity - usual general relativity. The gravity sector is completely standard, based as usual on the Einstein tensor, while in the matter sector Rastall's stress-energy tensor corresponds to an artificially isolated part of the physical conserved stress-energy.
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Authors
Matt Visser,