Lecture notes on interacting quantum fields in de Sitter space

By E. Akhmedov. 2013

134 citations recorded by the source corpus.

We discuss peculiarities of quantum fields in de Sitter (dS) space on the example of the self-interacting massive real scalar, minimally coupled to the gravity background. Nonconformal quantum field theories (QFTs) in dS space show very special infrared behavior, which is not shared by quantum fields neither in flat nor in anti-dS space: in dS space loops are not suppressed in comparison with tree level contributions because there are strong infrared corrections. That is true even for massive fields. Our main concern is the interrelation between these infrared effects, the invariance of the QFT under the dS isometry and the (in)stability of dS invariant states (and of dS space itself) under nonsymmetric perturbations.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/eadd81366e76a5cf884e31abfb8eb543d6d3440c

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In Astronomy and Astrophysics

1. M. Taronna
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In Atomic and Molecular Physics, and Optics

1. M. Taronna
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In Nuclear and High Energy Physics

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2. M. Taronna
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8. C. D. Pueyo

Citations in the corpus

• A Mellin space approach to cosmological correlators (2019, unknown): “[43–47].”
• Bootstrapping inflationary correlators in Mellin space (2019, background): “The first applications of this formalism to the calculation of cosmological correlation functions include [40, 97]; for clear pedagogical reviews see [52, 54, 55].”