A discrete nonetheless remarkable brick in de Sitter: the "massless minimally coupled field"

J.-P. Gazeau , A. Youssef (1)

1 APC (UMR_7164) - AstroParticule et Cosmologie

Over the last ten years interest in the physics of de Sitter spacetime has been growing very fast. Besides the supposed existence of a "de sitterian period" in inflation theories, the observational evidence of an acceleration of the universe expansion (interpreted as a positive cosmological constant or a "dark energy" or some form of "quintessence") has triggered a lot of attention in the physics community. A specific de sitterian field called "massless minimally coupled field" (mmc) plays a fundamental role in inflation models and in the construction of the de sitterian gravitational field. A covariant quantization of the mmc field, 'a la Krein-Gupta-Bleuler was proposed in [1]. In this talk, we will review this construction and explain the relevance of such a field in the construction of a massless spin 2 field in de Sitter space-time.

Mots clés: de Sitter; perturbative quantum gravity; massless minimally coupled

Domaines: Relativité Générale et Cosmologie Quantique [gr-qc]; Physique des Hautes Energies - Théorie [hep-th]

J.-P. Gazeau, A. Youssef. A discrete nonetheless remarkable brick in de Sitter: the "massless minimally coupled field". Physics of Atomic Nuclei / Yadernaya Fizika, 2010, 73 (2), pp.222-229. ⟨10.1134/S1063778810020031⟩. ⟨hal-00352379⟩