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Null energy condition and superluminal propagation
We study whether a violation of the null energy condition necessarily implies the presence of instabilities. We prove that this is the case in a large class of situations, including isotropic solids and fluids relevant for cosmology. On the other hand we present several counter-examples of consisten...
| Autores principales: | , , , |
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| Lenguaje: | eng |
| Publicado: |
2005
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1088/1126-6708/2006/03/025 http://cds.cern.ch/record/918135 |