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14.06.2023 / 14:30 / Hamburg, Bldg. 2a, seminar room 2 / Zoom
Quantum Universe LectureEffective Field Theory approaches for Gravity and Cosmology (2/3)
Claudia de Rham (Imperial College London)
In the study of our Universe, we are constantly challenged with physics a very different energy scales, starting from close to the Planck scale during inflation, to physics at the dark energy scale during the late time period of the Universe, hence covering physics over close to 60 orders of magnitude. The use of effective field theories (EFTs) valid within a range of energy scales with a particular field content therefore naturally plays an important role in understanding of gravity and cosmology. In this series of lectures, we will start with reviewing the EFT framework, building blocks and consistent constraints we can infer from a low-energy perspective. We will then consider their applications in gravitational situations relevant for the study of cosmology, black holes and more generic situations, where even if weak, gravity can play a significant role. We will then establish how demanding that these low-energy EFTs can be embedded in a standard Wilsonian high-energy completion leads to constraints that can be diagnosed already at low-energy and can complement observations in segregating between different classes of EFTs.
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