Scalar Tachyons in the de Sitter Universe

摘要: We provide a construction of class local and de Sitter covariant tachyonic quantum fields which exist for discrete negative values the squared mass parameter have no Minkowskian counterpart. These satisfy an anomalous non-homogeneous Klein–Gordon equation. The anomaly is field can be used to select physical subspace (of finite co-dimension) where homogeneous equation holds in usual form. show that model invariant on space. Our also sheds new light massless minimally coupled field, special instance it.