Non-Gaussianity from Entanglement During Inflation

Abstract

We compute the bi-spectrum of CMB temperature fluctuations for a state where the metric perturbation $\zeta$ is entangled with a spectator scalar field $\chi$. Novel terms in the cubic $\zeta$ action coupled to the scalar can be the dominant contribution to the bi-spectrum for such states and we highlight the differences between this result and the no-entanglement bi-spectrum. New shapes can be important in the bi-spectra leading to distinctive observational signatures.

17 pages, 7 figures

References in corpus (6)

• Observational Signatures and Non-Gaussianities of General Single Field Inflation
• Primordial Non-Gaussianities from Inflation Models
• Enhanced Non-Gaussianity from Excited Initial States
• Cosmological Consequences of Initial State Entanglement
• The quantum Fokker-Planck equation of stochastic inflation
• Generating Entangled Inflationary Quantum States

Cited by in corpus (1)

• Origin & evolution of the Universe