Two-flavor QCD phases and condensates at finite isospin chemical potential
نویسندگان
چکیده
We study the phase structure and condensates of two-flavor QCD at finite isospin chemical potential in the framework of a confining, Dyson-Schwinger equation model. We find that the pion superfluidity phase is favored at high enough isospin chemical potential. A new gauge invariant mixed quark-gluon condensate induced by isospin chemical potential is proposed based on Operator Product Expansion. We investigate the sign and magnitude of this new condensate and show that it’s an important condensate in QCD sum rules at finite isospin density. PACS numbers: 12.39.Fe; 11.30.RD; 12.38.Lg; E-mail: [email protected] E-mail: [email protected] E-mail: [email protected]
منابع مشابه
Bose-Einstein condensation in dense quark matter
We consider the problem of Bose condensation of charged pions in QCD at finite isospin chemical potential μI using the O(4)-symmetric linear sigma model as an effective field theory for twoflavor QCD. Using the 2PI 1/N-expansion, we determine the quasiparticle masses as well as the pion and chiral condensates as a function of the temperature and isospin chemical potential in the chiral limit an...
متن کاملQCD-like Theories at Finite Baryon and Isospin Density
We use 2-color QCD as a model to study the effects of simultaneous presence of chemical potentials for isospin charge, μI , and for baryon number, μB. We determine the phase diagrams for 2 and 4 flavor theories using the method of effective chiral Lagrangians at low densities and weak coupling perturbation theory at high densities. We determine the values of various condensates and densities as...
متن کامل0 QCD - like Theories at Finite Baryon and Isospin Density
We use 2-color QCD as a model to study the effects of simultaneous presence of chemical potentials for isospin charge, µ I , and for baryon number, µ B. We determine the phase diagrams for 2 and 4 flavor theories using the method of effective chiral Lagrangians at low densities and weak coupling perturbation theory at high densities. We determine the values of various condensates and densities ...
متن کاملThermodynamics of two-flavor lattice QCD with an improved Wilson quark action at non-zero temperature and density
We report the current status of our systematic studies of the QCD thermodynamics by lattice QCD simulations with two flavors of improved Wilson quarks. We evaluate the critical temperature of two flavor QCD in the chiral limit at zero chemical potential and show the preliminary result. Also we discuss fluctuations at none-zero temperature and density by calculating the quark number and isospin ...
متن کاملQuenched lattice QCD at finite isospin density and related theories
We study quenched QCD at finite chemical potential, μI , for the third component of isospin and quenched two-colour QCD at finite chemical potential, μ, for quark number. In contrast to the quenched approximation to QCD at finite quark-number chemical potential, the quenched approximations to these theories behave similarly to the full theories. The reason is that these theories have real posit...
متن کامل