Semiclassical back reaction in the formation of a straight cosmic string
We derive the back reaction on the gravitational field of a straight cosmic string during its formation due to the gravitational coupling of the string to quantum matter fields. A very simple model of string formation is considered. The gravitational field of the string is computed in the linear app...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1995 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/12306 |
| Acceso en línea: | https://hdl.handle.net/2445/12306 |
| Access Level: | acceso abierto |
| Palabra clave: | Astrofísica Relativitat general (Física) Gravitació Models de corda Teoria de camps (Física) Astrophysics General relativity (Physics) Gravitation String models Field theory (Physics) |
| Sumario: | We derive the back reaction on the gravitational field of a straight cosmic string during its formation due to the gravitational coupling of the string to quantum matter fields. A very simple model of string formation is considered. The gravitational field of the string is computed in the linear approximation. The vacuum expectation value of the stress tensor of a massless scalar quantum field coupled to the string gravitational field is computed to one loop order. Finally, the back-reaction effect is obtained by solving perturbatively the semiclassical Einsteins equations. |
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