Non-universal correction in the effective string theory of flux tubes

Project funded by Fundação para a Ciência e a Tecnologia, I.P. (FCT) (FCT_CPCA_2024_01), grant 2024.09383.CPCA.A2. Funded amount: EUR 7,253.33, as stated by the source. Runs 2025-01-01 to 2026-01-01. Keywords: Monte Carlos, Conformal Field Theory, Lattice Quantum Chromodynamics, Effective String Theory, Exact sciences, Exact sciences/Physical sciences. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2025-07-18); national funding data, not CORDIS; selected because its keywords name quantum. Abstract given by the source: The question of why quarks are confined to hadrons has remained an unsolved mystery since since the development of Quantum Chromodynamics (QCD). The primary challenge lies in the lack of analytic tools to study this phenomenon. The perturbative framework, widely successful for Quantum Electrodynamics (QED), is inadequate to study these strongly coupled emergent behaviours. Our current understanding of confinement stems mainly from integrable toy models, experiments, and lattice simulations. Recently, the field was revitalized by the development of effective string theory (EST), describing the dynamics of flux tubes, an object unequivocally connected with confinement . Rather than attempting to derive the existence of flux tubes, this framework assumes their existence and studies their possible dynamics. This has led to significant breakthroughs in our understanding of flux tubes, such as the discovery of low-energy universality, and the realization that the EST is remarkably predictive at low energies - the first three coefficients are predicted by symmetry - and the discovery of an axion in QCD flux tubes Some exploratory studies have attempted to measure the first non-universal coefficients, achieving varying degrees of success. However, these results either lack the level of precision required for scientific “discovery” or are inconsistent with bootstrap results. Thus, more precise results, with a careful treatment of systematic errors, are required to be considered valid. This is the goal of our proposed research. We aim to resolve this issue by providing reliable measurements of the first non-universal coefficient through an innovative approach, employing an enhanced Wang-Landau multicanonical algorithm. The improvements we made to the Wang-Landau algorithm may have scientific interest on its own, particularly in applications where a high level of precision is required.

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 2026-10-28. 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 "Non-universal correction in the effective string theory of flux tubes" is funded by FCT with a grant of EUR 7,253.33, running from January 1, 2025, to January 1, 2026. It focuses on the confinement of quarks in hadrons using effective string theory. Suggested technology pillar: simulation. Generated by AI from the public source text; it may contain errors and the original source is authoritative.