REVIEW 5 cited by
Obstructions to Bell CMB Experiments
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
Signed reviews
read the original abstract
We present a general and systematic study of how a Bell experiment on the cosmic microwave background could be carried out. We introduce different classes of pseudo-spin operators and show that, if the system is placed in a two-mode squeezed state as inflation predicts, they all lead to a violation of the Bell inequality. However, we also discuss the obstacles that one faces in order to realize this program in practice and show that they are probably insurmountable. We suggest alternative methods that would reveal the quantum origin of cosmological structures without relying on Bell experiments.
Forward citations
Cited by 5 Pith papers
-
Tensor Catalyzed Decoherence of Primordial Scalar Fluctuations
In single-field inflation, gravitational interactions mixing short-wavelength tensor and scalar modes decohere long-wavelength scalar perturbations at a rate proportional to (H/M_p)^2, with no suppression by the slow-...
-
Effective Field Theory and In-In Correlators
Matching in-in correlators between a full theory and its effective theory requires extra boundary terms in flat space, but those terms fade away in de Sitter space.
-
A Landscape of Cosmological Decoherence
Requiring decohered cosmological perturbations to admit a classical P-function forces their momentum variance above the vacuum value, and demanding a linear gravitational potential at reheating bounds that variance by...
-
When inflationary perturbations refuse to classicalise: the role of non-Gaussianity in Wigner negativity
In ultra-slow-roll inflation, the Wigner function of the inflationary Goldstone field becomes negative and its negativity grows with the scale factor squared, so the perturbations do not automatically become classical.
-
Inflationary Decoherence from the Gravitational Floor
Gravitational self-interactions alone decohere super-Hubble inflationary fluctuations with purity loss growing as (aH/k)^5, faster than the a^3 growth of earlier calculations.
Discussion (0). Continue with ORCID to comment.