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arXiv · 1902.07567

Non-Gaussianity from Entanglement During Inflation

Nadia Bolis·Andreas Albrecht·R. Holman
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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.

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Nadia Bolis, Andreas Albrecht, R. Holman. 2019-02-20. Non-Gaussianity from Entanglement During Inflation. https://doi.org/10.1088/1475-7516%2F2019%2F07%2F021

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