Asymptotically safe inflation from quadratic gravity
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Asymptotically Safe theories of gravity have recently received much attention. In this work we discuss a class of inflationary models derived from quantum-gravity modification of quadratic gravity according to the induced scaling around the non-Gaussian fixed point at very high energies. It is argued that the presence of a three dimensional ultraviolet critical surface generates operators of non-integer power of the type R2-θ/2 in the effective Lagrangian, where θ>0 is a critical exponent. The requirement of a successful inflationary model in agreement with the recent Planck 2015 data puts important constraints on the strength of this new type of couplings.
Original language | English |
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Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 750 |
Pages (from-to) | 638-642 |
Number of pages | 5 |
ISSN | 0370-2693 |
DOIs | |
Publication status | Published - 12 Nov 2015 |
Bibliographical note
Publisher Copyright:
© 2015 The Authors.
ID: 388514319