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Transcript
Effective Quantum Gravity and Inflation Iberê Kuntz Theoretical Particle Physics department University of Sussex United Kingdom The idea that inflation may be due to degrees of freedom already present in the standard model of particle physics or quantum general relativity is extremely attractive and has received much attention in the recent years. In particular two models stand out by their simplicity and elegance. Higgs inflation with a large nonminimal coupling of the Higgs boson H to the Ricci scalar (ξH † HR) and Starobinsky’s inflation model based on R2 gravity are both minimalistic and perfectly compatible with the latest Planck data. The aim of this talk is to point out an intriguing distinct possibility, namely that Starobinsky inflation is generated by quantum effects due to a large non-minimal coupling of the Higgs boson to the Ricci scalar. In this framework we do not need to posit that the Higgs boson starts at a high field value in the early universe which would alleviate constraints coming from the requirement of having a stable Higgs potential even for large Higgs field values. 1
