Monopoles in 5d pure Yang-Mills and their role in criticality

Project funded by Fundação para a Ciência e a Tecnologia, I.P. (FCT) (FCT_CPCA_2021_01), grant 2021.09830.CPCA. Funded amount: EUR 615, as stated by the source. Runs 2022-03-03 to 2023-07-31. Keywords: Five Dimensional Yang-Mills, Non-renormalizable Quantum Field Theories, Lattice Quantum Chromodynamics, Monte Carlo Simulation, Criticality, Exact sciences. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2025-07-20); national funding data, not CORDIS; selected because its keywords name quantum. Abstract given by the source: Current insights on non-renormalizable Quantum Field Theories (NRQFTs) are scarce. These may or not be physical, but the absence of analytical tools has made their study mostly inaccessible. Meanwhile, the idea that General Relativity (GR) may be a fundamental NRQFT is still an open question. Under this paradigm, a detailed study of non-trivial fixed-points in 5D Yang-Mills QFTs is an outstanding problem that may help shed light onto the true nature of GR. Such studies have been attempted before, using analytical methods or numerical methods. In the latter, one highlights the use of powerful Monte Carlo (MC) simulations in lattice versions of the theory. In a previous numerical work by the PI [arxiv:2103.15242] a transition region has been unveiled that requires a two-parameter tuning to yield 2nd-order criticality. The latter result contradicts the predictions of a one-parameter controlled criticality obtained previously by eps-expansions around d=4. In addition, an atypical finite-size scaling of the entropy, within the thermodynamically unstable region, has been identified for these models hinting at their nontrivial nature. In this project, we will further explore this work line by doing optimized MC simulations on lattice 5D Yang-Mills models to gain insight into our previous findings. A possible source of the unexpected relevant parameter can lie in nonperturbative instanton effects, which in 5D become dynamical particles (monopoles) with a role yet to be determined.

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of Fundação para a Ciência e a Tecnologia, I.P. (FCT). Retrieved 2026-10-22. 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 "Monopoles in 5d pure Yang-Mills and their role in criticality" is funded by FCT with a grant of EUR 615, running from March 3, 2022, to July 31, 2023. It focuses on non-renormalizable Quantum Field Theories and their implications for General Relativity. Suggested technology pillar: simulation. Generated by AI from the public source text; it may contain errors and the original source is authoritative.