{"id":{"repo_id":"bielefeld","oai_identifier":"oai:pub.uni-bielefeld.de:2983242"},"canonical_url":"https://search.dev.ndltd.org/etd/bielefeld/oai:pub.uni-bielefeld.de:2983242","repository":{"repo_id":"bielefeld","name":"Universität Bielefeld","base_url":"https://pub.uni-bielefeld.de/oai"},"display":{"title":"Thermodynamics of 5-flavor QCD","abstract":"This thesis investigates the chiral phase transition in Quantum Chromodynamics (QCD) with five mass degenerate quark flavors. After performing lattice QCD simulations, I discuss measurements of the chiral condensate at small masses and classify the chiral phase transition. The data analysis is done via established approaches, as well as state-of-the-art machine learning means. That way, I introduce the Masked Autoregressive Flow (MAF) and the Vision Transformer (ViT) to QCD data analysis. This approach is used to identify a critical mass marking the boundary between first-order and crossover regions. Another part of this thesis analyzes scaling functions in the 3-d, Z(2), O(2) and O(4) universality classes and their finite size dependence using Monte Carlo simulations of improved ϕ⁴ models. We extract parametrizations of the Z(2) and O(2) scaling functions to high precisions by fitting data from simulations of the respective spin models.","abstract_html":"This thesis investigates the chiral phase transition in Quantum Chromodynamics (QCD) with five mass degenerate quark flavors. After performing lattice QCD simulations, I discuss measurements of the chiral condensate at small masses and classify the chiral phase transition. The data analysis is done via established approaches, as well as state-of-the-art machine learning means. That way, I introduce the Masked Autoregressive Flow (MAF) and the Vision Transformer (ViT) to QCD data analysis. This approach is used to identify a critical mass marking the boundary between first-order and crossover regions. Another part of this thesis analyzes scaling functions in the 3-d, Z(2), O(2) and O(4) universality classes and their finite size dependence using Monte Carlo simulations of improved ϕ⁴ models. We extract parametrizations of the Z(2) and O(2) scaling functions to high precisions by fitting data from simulations of the respective spin models.","abstract_has_math":false,"creators":["Neumann, Marius"],"institution":"Universität Bielefeld","degree_name":null,"degree_level":"thesis.doctoral","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2023,"date_issued":"2023-09-25","date_published":"2023-09-25","updated_at":"2026-07-27T18:50:01Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://pub.uni-bielefeld.de/record/2983242","outbound_label":"Repository record","outbound_source":"source_url"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Neumann, Marius"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:publisher","label":"Institution","values":["Universitätsbibliothek Bielefeld"]},{"key":"dc:type","label":"Dc Type","values":["doctoralThesis"]},{"key":"thesis:degree_level","label":"Degree Level","values":["thesis.doctoral"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Universität Bielefeld"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["This thesis investigates the chiral phase transition in Quantum Chromodynamics (QCD) with five mass degenerate quark flavors. After performing lattice QCD simulations, I discuss measurements of the chiral condensate at small masses and classify the chiral phase transition. The data analysis is done via established approaches, as well as state-of-the-art machine learning means. That way, I introduce the Masked Autoregressive Flow (MAF) and the Vision Transformer (ViT) to QCD data analysis. This approach is used to identify a critical mass marking the boundary between first-order and crossover regions. Another part of this thesis analyzes scaling functions in the 3-d, Z(2), O(2) and O(4) universality classes and their finite size dependence using Monte Carlo simulations of improved ϕ⁴ models. We extract parametrizations of the Z(2) and O(2) scaling functions to high precisions by fitting data from simulations of the respective spin models."]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Thermodynamics of 5-flavor QCD"]}]}],"canonical_facts":{"dc:creator":["Neumann, Marius"],"dc:description.abstract":["This thesis investigates the chiral phase transition in Quantum Chromodynamics (QCD) with five mass degenerate quark flavors. After performing lattice QCD simulations, I discuss measurements of the chiral condensate at small masses and classify the chiral phase transition. The data analysis is done via established approaches, as well as state-of-the-art machine learning means. That way, I introduce the Masked Autoregressive Flow (MAF) and the Vision Transformer (ViT) to QCD data analysis. This approach is used to identify a critical mass marking the boundary between first-order and crossover regions. Another part of this thesis analyzes scaling functions in the 3-d, Z(2), O(2) and O(4) universality classes and their finite size dependence using Monte Carlo simulations of improved ϕ⁴ models. We extract parametrizations of the Z(2) and O(2) scaling functions to high precisions by fitting data from simulations of the respective spin models."],"dc:format.medium":["application/pdf"],"dc:publisher":["Universitätsbibliothek Bielefeld"],"dc:title":["Thermodynamics of 5-flavor QCD"],"dc:type":["doctoralThesis"],"thesis:degree_level":["thesis.doctoral"],"thesis:institution_name":["Universität Bielefeld"]},"updated_at":"2026-07-27T18:50:01Z"}