Masayuki Matsuzaki
Published 2009-09-30, updated 2010-07-20Version 3
We study the character change of the pionic condensation at finite isospin chemical potential \mu_\mathrm{I} by adopting the linear sigma model as a non-local interaction between quarks. At low |\mu_\mathrm{I}| the condensation is purely bosonic, then the Cooper pairing around the Fermi surface grows gradually as |\mu_\mathrm{I}| increases. This q-\bar q pairing is weakly coupled in comparison with the case of the q-q pairing that leads to color superconductivity.
Comments: 17 pages, 3 figures, typos in eq.(6) and refs.[37] and [41] are corrected, published in Phys. Rev. D
Journal: Phys.Rev.D82:016005,2010
The linear sigma model at a finite isospin chemical potential
Spontaneous Generation of Pseudoscalar Mass in the U(3)xU(3) Linear Sigma Model
Two-flavor QCD phases and condensates at finite isospin chemical potential
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