Meson Spectral Functions at Finite Temperature and Isospin Density with Functional Renormalization Group

Abstract

The pion superfluid and the corresponding Goldstone and soft modes are investigated in two-flavor quark-meson model with functional renormalization group. By solving the flow equations for the effective potential and the meson two-point functions at finite temperature and isospin density, the critical temperature for the superfluid increases sizeably in comparison with solving the flow equation for the potential only. The spectral function for the soft mode shows clearly a transition from meson gas to quark gas with increasing temperature and a crossover from BEC to BCS pairing of quarks with increasing isospin density.

14 pages, 7 figures

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• Fluctuations in the quark-meson model for QCD with isospin chemical potential
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• Magnetic structure of isospin-asymmetric QCD matter in neutron stars
• Ultracold atoms and the Functional Renormalization Group
• Flow equations for spectral functions at finite external momenta
• Renormalisation Flow and Universality for Ultracold Fermionic Atoms
• Functional renormalization group at finite density and Bose condensation
• Diquark Bose-Einstein Condensation and Nuclear Matter
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Cited by in corpus (16)

• The nonperturbative functional renormalization group and its applications
• QCD phase diagram for nonzero isospin-asymmetry
• Finite temperature spectral functions in the O(N)-model
• Spectral functions in the ${\varphi }^4$-theory from the spectral DSE
• Bound state properties from the Functional Renormalisation Group
• Spectral functions from the real-time functional renormalization group
• Thermodynamics of 2+1 Flavor Polyakov-Loop Quark-Meson Model under External Magnetic Field
• Thermal properties of light mesons from holography
• The QCD moat regime and its real-time properties
• Pion quasiparticles and QCD phase transitions at finite temperature and isospin density from holography
• Self-consistent $O(4)$ model spectral functions from analytically continued FRG flows
• QCD phase diagram at finite isospin chemical potential and temperature in an IR-improved soft-wall AdS/QCD model
• Thermalization and dynamical spectral properties in the quark-meson model
• Fermion spectral function in hot strongly interacting matter from the functional renormalization group
• Gluon Propagators in $2+1$ Lattice QCD with Nonzero Isospin Chemical Potential
• Chiral criticality and glue dynamics