Entanglement masquerading in the CMB
Arsalan Adil, Andreas Albrecht, Rose Baunach, R. Holman, Raquel H., Ribeiro, Benoit J. Richard

TL;DR
This paper investigates whether entangled quantum states generated during inflation can be distinguished from the standard Bunch-Davies state using Planck CMB data, developing a perturbative framework for analysis.
Contribution
The authors develop a systematic perturbative framework to constrain or detect entangled inflationary states with CMB data, extending previous theoretical work.
Findings
Most entangled states considered are consistent with current data
The framework can be expanded to explore a wider variety of entangled states
Current data does not strongly favor or exclude entangled states over the Bunch-Davies state
Abstract
The simplest single-field inflation models capture all the relevant contributions to the patterns in the Cosmic Microwave Background (CMB) observed today. A key assumption in these models is that the quantum inflationary fluctuations that source such patterns are generated by a particular quantum state -- the Bunch-Davies (BD) state. While this is a well-motivated choice from a theoretical perspective, the question arises of whether current data can rule out other, also well motivated, choices of states. In particular, as we previously demonstrated in arXiv:2104.13410 [hep-th], entanglement is naturally and inevitably dynamically generated during inflation given the presence of a "rolling" spectator scalar field -- and the resulting entangled state will yield a primordial power spectrum with potentially measurable deviations compared to the canonical BD result. For this work we…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsCosmology and Gravitation Theories · Stochastic processes and financial applications · Dark Matter and Cosmic Phenomena
