21 citations · 109 across the 13 of their papers we have counts for
13 papers
Absence of coexisting phase of quark-antiquark and diquark condensed phases in the extended Gross-Neveu model in dimensions
Akira Niégawa
We show that the coexisting phase of quark-antiquark and diquark condensed phases is absent in the cold quark matter in the dimensional extended Gross-Neveu model, which is…
Quantum Field Theories in Nonextensive Tsallis Statistics
H. Kohyama, A. Niegawa
Within the framework of Tsallis statistics with q ~ 1, we construct a perturbation theory for treating relativistic quantum field systems. We find that there appear initial correla…
Improvement of the hot QCD pressure by the minimal sensitivity criterion
M. Inui, A. Niegawa, H. Ozaki
The principles of minimal sensitivity (PMS) criterion is applied to the perturbative free energy density, or pressure, of hot QCD, which include the and part o…
Ferromagnetism in quark matter
A. Niegawa
We investigate the magnetic property of the cold quark matter employing the magnetic moment as the order parameter. Through analysis of the effective potential $V (\vecμ^{…
Comment on fermion propagator in real-time quantum-field theory at finite temperature and density
A. Niégawa
Two forms are available for the fermion propagator at finite temperature and density. It is shown that, when one deals with a diquark-condensation-operator inserted Green function…
Fermion propagator in out of equilibrium quantum-field system and the Boltzmann equation
A. Niégawa
We aim to construct from first principles a perturbative framework for studying nonequilibrium quantum-field systems that include massless Dirac fermions. The system of our concern…