Violation of the Conformal Limit at Finite Density: Insights from Effective Models and Lattice QCD
Abstract
In this work, we discuss recent results obtained with the application of the medium separation scheme (MSS) in different contexts where a clear violation of the conformal limit for the speed of sound at finite density has been observed in Quantum Chromodynamics (QCD). We analyze several scenarios, including QCD at finite isospin density, two-color QCD, and two-flavor color superconductivity. Whenever possible, we compare our findings with lattice QCD (LQCD) results, showing that the Nambu–Jona-Lasinio (NJL) model combined with the MSS provides a consistent description across different regimes of the QCD phase diagram. Our analysis highlights how effective models, when properly regularized, can capture essential nonperturbative features of dense QCD matter, offering complementary insights to lattice simulations.
Fields of Study & Subjects
High-Energy Particle Collisions Research
Quantum Chromodynamics and Particle Interactions
Physics of Superconductivity and Magnetism
Publication details
- Journal / source
- Symmetry
- Publisher
- MDPI AG
- Volume
- 18
- Issue
- 2
- Pages
- 220–220
- Publication date
- 25 January 2026
- Language
- EN