Holographic spacetimes from simple quantum theories

Project funded by Swedish Research Council (Project grant), grant 2018-03803_VR. Participating organisations named by the source: Stockholm University. Funded amount: SEK 3,560,000, as stated by the source. Runs 2019-01-01 to 2022-12-31. Keywords: Naturvetenskap, Natural Sciences, Fysik, Physical Sciences, Subatomär fysik, Subatomic Physics. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2025-12-04); national funding data, not CORDIS. Abstract given by the source: Observations suggest that our universe initially expands exponentially, slows down, and then starts expanding exponentially again, now at a much slower rate. The project aims to study a fundamental theory for such processes, which can unify cosmological history and replace phenomenological models known to fail at short distance scales.A particular class of particle theory differs from all others by naturally acccomodating an exponentially expanding universe. This class of theories actually have two different uniform acceleration rates, and can switch irreversibly from one rate to the other. Such switches can be studied using quantum field theory tools in place of gravity methods.In the project tools to probe the switch will be developed, first in simpler settings, second in the evaluation of correlation functions of an auxiliary quantum fileld theory and finally in translating correlation functions in the auxiliary theory to primordial cosmological fluctuations. The applicant, a project postdoc, two PhD students and international collaborators will calculate and compute using quantum field theory methods. We may also find experimentalists who can simulate the auxiliary system by engineering an optical lattice.The research is expected to produce a working toy model for a qualitative global history of the universe. This kind of model is quite constrained but can be improved to better fit detailed history and particle content.

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of Swedish Research Council. Retrieved 2026-10-28. Licence: Creative Commons Attribution 4.0 (OpenAIRE Graph). Selected metadata, adapted presentation; the publisher's record is authoritative. No endorsement by the source is implied. Licence: Creative Commons Attribution 4.0 (CC BY 4.0).

AI-assisted summary: The project "Holographic spacetimes from simple quantum theories" is funded by the Swedish Research Council with a grant of SEK 3,560,000, running from January 1, 2019, to December 31, 2022, at Stockholm University. It aims to study a fundamental theory of cosmological expansion processes. Suggested technology pillar: enabling. Generated by AI from the public source text; it may contain errors and the original source is authoritative.