Scalar Tachyons in the de Sitter Universe |
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Authors: | Jacques Bros Henri Epstein and Ugo Moschella |
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Institution: | 1.Service de Physique théorique, CEA,Gif-sur Yvette,France;2.Institut des Hautes études Scientifiques,Bures-sur-Yvette,France;3.Università dell’Insubria,Como,Italy;4.INFN,Milan,Italy |
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Abstract: | We provide a construction of a class of local and de Sitter covariant tachyonic quantum fields which exist for discrete negative
values of the squared mass parameter and which have no Minkowskian counterpart. These quantum fields satisfy an anomalous
non-homogeneous Klein–Gordon equation. The anomaly is a covariant field which can be used to select the physical subspace
(of finite co-dimension) where the homogeneous tachyonic field equation holds in the usual form. We show that the model is
local and de Sitter invariant on the physical space. Our construction also sheds new light on the massless minimally coupled
field, which is a special instance of it. |
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Keywords: | |
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