Imprints of Quantum Gravity in the Cosmic Microwave Background

Abstract

It has been shown that the spectrum of quantum gravity contains at least two new modes in addition to the massless graviton: a massive spin-0 and a massive spin-2. We calculate their power spectrum during inflation and we argue that they could leave an imprint in the cosmic microwave background should their masses be below the inflationary scale.

References in corpus (3)

• The Lightest of Black Holes
• Graviton propagator, renormalization scale and black-hole like states
• Gravitational Waves in Effective Quantum Gravity

Cited by in corpus (3)

• Hubble tension bounds the GUP and EUP parameters
• Hubble tension as a guide for refining the early Universe: Cosmologies with explicit local Lorentz and diffeomorphism violation
• Quantum Hair During Gravitational Collapse