QUADRATIC GRAVITY IN (2+1)D
| Autor: | Abel Azeredo, H. Mukai, Antonio Accioly |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Physics
Nuclear and High Energy Physics Centers of gravity in non-uniform fields General relativity General Physics and Astronomy Astronomy and Astrophysics General Relativity and Quantum Cosmology symbols.namesake Classical mechanics Gravitational field Linearized gravity symbols Semiclassical gravity f(R) gravity Equivalence principle Higher-dimensional Einstein gravity |
| Zdroj: | Modern Physics Letters A. 16:1449-1456 |
| ISSN: | 1793-6632 0217-7323 |
| DOI: | 10.1142/s0217732301004698 |
| Popis: | Quadratic gravity in (2+1)D, unlike three-dimensional Einstein's gravity, is locally nontrivial and has an extremely well-behaved potential. Here we explore the gravitational properties of a metric generated by a pointlike matter distribution within the context of three-dimensional linearized quadratic gravity. This metric greatly resembles the four-dimensional metric of a straight U(1)-gauge cosmic string in the framework of linearized quadratic gravity. It is found that a gravitational force is exerted on a slowly moving test particle, a feature not present in general relativity in (2+1)D. It is also found that the massive scalar mode does not contribute anything to the gravitational deflection. An explanation for this fact is provided. |
| Databáze: | OpenAIRE |
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