| | |
| | |
Stat |
Members: 3645 Articles: 2'504'928 Articles rated: 2609
25 April 2024 |
|
| | | |
|
Article overview
| |
|
Unimodular gravity with external sources | Enrique Álvarez
; Mario Herrero-Valea
; | Date: |
27 Sep 2012 | Abstract: | The only allowed source of the gravitational field in the unimodular theory,
invariant under area-preserving (transverse) diffeomorphisms as well as Weyl
transformations, is just the traceless piece of the energy-momentum tensor.
This fact notwithstanding, the free energy produced by arbitrary sources (not
only static ones) is identical to the one predicted by general relativity. This
encompasses all weak field tests of gravitation. There is an important
difference with general relativity though. A pure trace source, such as the one
produced by a pure vacuum energy with frozen scalar field does not weigh at
all. This sheds new light on the direct cosmological constant problem. | Source: | arXiv, 1209.6223 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |