English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Infinite entanglement fluctuations appear when a quantum field theory on acausally complete domain of space-time is a type $III$ factor. In the weakgravity limit $G_N=0$ this factor can be transformed into a crossed producttype $II$ factor with finite entanglement fluctuations by adding a physicalreference frame system (observer). The use of a physical reference frame todefine a regularization of divergent entanglement is formally identical to thequantum information approach to superselection charges. In that case the addedreference frame allows quantum superpositions between different superselectionsectors. For the case of cosmological horizons we map the primordialinflationary slow rolling phase into a type $II$ modification of the pure deSitter type $III$ factor and we use the so defined type $II$ finiteentanglement fluctuations to predict the primordial power spectrum of scalarcurvature fluctuations. For the Hagedorn high temperature phase of large $N$Yang Mills, the type $II$ description of the Hagedorn phase accounts, in thelarge $N$ limit, for the quantum fluctuations of the interval of thecorresponding matrix model eigenvalue distribution.

Entanglement, Observers and Cosmology: a view from von Neumann Algebras