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キーワード:
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要旨:
The theory of a massless, minimally coupled scalar field φ is closely related to that of a massless, antisymmetric tensor field Aμν. It is shown that in de Sitter space the field Aμν has a de Sitter-invariant state with a well-defined two-point function, while it is known that no such states exist for the scalar field φ.