Resumen: We discuss a minimal canonical modification of electrodynamics in order to account for ultraviolet Lorentz violating effects. This modification creates a birefringence that rotates the polarization planes from different directions. Such effects might be detectable in the anisotropic polarization of the Cosmic Microwave Background radiation. Idioma: Inglés DOI: 10.1016/j.physletb.2006.02.014 Año: 2006 Publicado en: Physics Letters B 634, 5-6 (2006), 471-473 ISSN: 0370-2693 Factor impacto JCR: 5.043 (2006) Categ. JCR: PHYSICS, MULTIDISCIPLINARY rank: 7 / 68 = 0.103 (2006) - Q1 - T1 Tipo y forma: Artículo (Versión definitiva)