Lecturer: Kei Iida (RIBS Laboratory, RIKEN)

Title : Superfluid phases of quark matter: 
	Ginzburg-Landau theory and color neutrality

Date:   6/26/2001 (Tue.) 15:00 -

Place:  RIKEN Exhibition Bldg. (TENJI-TOU) 1F AV Room

                           The seminar will be given in English.

Abstract:
Applying Ginzburg-Landau theory to a strongly-coupled ultrarelativistic
quark matter superfluid, we elucidate the possible phase diagrams near
the critical temperature.  We complement the general
Ginzburg-Landau approach by deriving the high-density asymptotic
form of the Ginzburg-Landau free energy from the weak-coupling gap
equation involving color magnetic interactions.  Incorporating the color
neutrality constraint into the general Ginzburg-Landau theory by
introducing differences in the chemical potential between colors, we
find that the gap is suppressed by this constraint in the presence of
anisotropy of the order parameters in color space.