Modifications to Cosmological Power Spectra from Scalar-Tensor Entanglement and their Observational Consequences

TL;DR

This paper explores how initial quantum entanglement between scalar and tensor fluctuations during inflation can modify cosmological power spectra, potentially explaining large-scale anomalies in the CMB.

Contribution

It introduces a model with entangled initial states of fluctuations and calculates the resulting modifications to cosmological power spectra, linking quantum entanglement to observable CMB features.

Findings

Entanglement can alter the angular power spectra ($C_l$'s).

Possible explanation for large-scale CMB anomalies.

Entanglement may break rotational invariance.

Abstract

We consider the effects of entanglement in the initial quantum state of scalar and tensor fluctuations during inflation. We allow the gauge-invariant scalar and tensor fluctuations to be entangled in the initial state and compute modifications to the various cosmological power spectra. We compute the angular power spectra ($C_l$'s) for some specific cases of our entangled state and discuss what signals one might expect to find in CMB data. This entanglement also can break rotational invariance, allowing for the possibility that some of the large scale anomalies in the CMB power spectrum might be explained by this mechanism.