de Sitter Tachyons and Related Topics

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• 作者：Henri Epstein ; Ugo Moschella
• 刊名：Communications in Mathematical Physics
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：336
• 期：1
• 页码：381-430
• 全文大小：614 KB
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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.