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作者单位:Henri Epstein (1) Ugo Moschella (1) (2) (3)
1. Institut des Hautes études Scientifiques, 91440, Bures-sur-Yvette, France 2. DiSat, Università dell’Insubria, 22100, Como, Italy 3. INFN, Sez. di Milano, Milan, Italy
刊物类别:Physics and Astronomy
刊物主题:Physics Mathematical and Computational Physics Quantum Physics Quantum Computing, Information and Physics Complexity Statistical Physics Relativity and Cosmology
出版者:Springer Berlin / Heidelberg
ISSN:1432-0916
文摘
We present a complete study of a family of tachyonic scalar fields living on the de Sitter universe. We show that for an infinite set of discrete values of the negative squared mass, the fields exhibit a gauge symmetry and there exists for them a fully acceptable local and covariant quantization similar to the Feynman–Gupta–Bleuler quantization of free QED. For general negative squares masses we also construct positive quantization where the de Sitter symmetry is spontaneously broken. We discuss the sense in which the two quantizations may be considered physically inequivalent even when there is a Lorentz invariant subspace in the second one.