2025/10/01 by Jonas Stoll, Stoll, Jonas, Niklas Zorbach +3
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Field (mathematics) #Flow (mathematics) #Functional renormalization group #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #Phase (matter) #Phase transition #Quantum Chromodynamics and Particle Interactions #Renormalization #Renormalization group #Singularity #Superconductivity (cond-mat.supr-con) #Tricritical point
paper · pdf · doi:10.48550/arxiv.2510.01066
published in arXiv (Cornell University) (Cornell University)
openalex publication_date 2025/10/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We study the renormalization group flow of the scale-dependent effective potential of a quark-diquark model with full field dependence at nonzero chemical potential. This includes a discussion of approximations in relation to complex bosonic fields and the Silver-Blaze property. The resulting flow equation for the scale-dependent effective potential can in principle be solved down to the infrared limit. For our quark-diquark model, which may serve as a low-energy model for dense strong-interaction matter, we find that a competition between the Bardeen-Cooper-Schrieffer singularity and bosonic fluctuations can trigger a first-order phase transition at low temperatures that turns into a second-order phase transition at a tricritical point as the temperature increases.