Teoria de Casimir para a energia escura revisitada
We assume that Dark Energy" (of a fixed small region of space at the present cosmic time) may be identified with the system consisting of the vacuum and of a few one-particle states of zero momentum of a scalar quantum field of mass u different 0. Under this assumption we show that local quantu...
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| Tipo de recurso: | tesis de maestría |
| Estado: | Versión publicada |
| Fecha de publicación: | 2009 |
| País: | Brasil |
| Institución: | Universidade Federal de Minas Gerais (UFMG) |
| Repositorio: | Repositório Institucional da UFMG |
| Idioma: | portugués |
| OAI Identifier: | oai:repositorio.ufmg.br:1843/ESCZ-7YSJH2 |
| Acceso en línea: | http://hdl.handle.net/1843/ESCZ-7YSJH2 |
| Access Level: | acceso abierto |
| Palabra clave: | Teoria de Casimir Energia escura Fisica Dark energy |
| Sumario: | We assume that Dark Energy" (of a fixed small region of space at the present cosmic time) may be identified with the system consisting of the vacuum and of a few one-particle states of zero momentum of a scalar quantum field of mass u different 0. Under this assumption we show that local quantum field theory yields a corresponding energy momentum tensor of the perfect fuid form, and that a strictly positive energycan be localized only in regions of linear dimension L of the order of the particle Compton wave-length 1/u. Some early conjectured values for the \axion" rest-mass yield an estimate 1:44x10-56+4GeV4 for the dark energy density. In this way, we hope to have "made a case" for revisiting the Casimir theory of dark energy, proposed in 2002 by M. Turner. |
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